Let's talk about Quinn (and Valor)
So, ever since Quinn was released, she's always remained to be one of my favorite champions in League. Despite her current state, meta, popularity, balance and attention. With this post, I want to go in more in details what I like and dislike about Quinn, and also some of my personal thought of how I think she could be improved as a whole. Also before I begin, these are simply my general thoughts about Quinn, I'm no balance expert when it comes to numbers and such.
So where to start? Well, what makes Quinn (and Valor)? Whats the feel and lore behind her?: A dynamic duo, tactile, calculated, tracker and scout. Together, Quinn and Valor breach the enemy lines with Valor scouting ahead through the air, while Quinn covers the ground, only to then poke someone's eyes out and pepper them with bolts. She's a Demacian, while Garen spins into the front-line, and Lux shooting rainbows across the map, Quinn is very much the secret agent of Demacia. The two work together and only together.
What makes Quinn and Valor cool and unique?: The first obvious thing would be that they are two, both Quinn and Valor, one on land, the other in the sky. She's armed and dressed for the job (no Morgana battle bikini). She's cocky but careful (great voice actor). Her weapon is a damn machine-crossbow?! (cool weapon). Some form of blinding ability feels really satisfying and thematic "go for the eyes!". Map control through scouting and long distance mobility. Anti-melee or anti-auto attacker. She's part of the Demacia Elite Ranger team. The idea of having a pet at all time to provide cover and support for you, unlike say Tibbers, Malz voidlings, or Bard meeps who are more one time uses.
Now lets get into the many strange and annoying things that does not feel good on this champion: Its obvious that riot designed her to fill the role as an ADC, but her kit is so split that it makes it impossible for her to excel in that role, or any other for that matter. I often feel as though the things she brings to the game, other champions does sooo much better. She's got short range and good amounts of burst, but both Graves and Lucian outshines her easily at that. Nearly all of her abilities just ends up feeling clunky and unrewarding while also putting her into great danger. I mean come one, Valor is a bird, how is it that Quinn has to literary THROW him into someone's face, only to then disappear into a puff of feathers? Her Vault sounds cool on paper, but most of the time it just screws Quinn over and puts her into danger. Her Heightened Senses is alright but far worse compared to Ashe's arrow or Kalista's banshee, and it ends up feeling like a waste of a skill slot, even with the added attack and movement speed passive. Although Harrier has been improved over time since her release, it still feels extremely awkward and lacking. Last and probably the most odd part of Quinn's kit, her ultimate, which turns her into an glorified taxi with a faceplant assassination tool and a hefty cooldown. She's just this weird fighter/assassin/marksman hybrid, none of which she's exceptionally good at.
What could make Quinn and Valor feel better?: Over all I'd like to see Valor have a more noticeable part to Quinn's kit, instead of having to CAST blinding assault, Valor is very much free to act on his own free will without Quinn throwing him around. Perhaps make it something similar to Viktor's laser, where Valor can swoop down in different directions and blind whomever he hits. Hell, remove or reduce the clunky cast animation, let Valor swoop down while Quinn is moving around the battlefield. As for Heightened Senses, instead of Valor only opening his eyes every 40-50 second (not sure where he's at when W is on cooldown), make it so that Quinn passively get increased line of sight, or so that she can see through nearby brushes. A good example of something that I really liked recently was the Ocklepods from Black Market Brawl. Have Valor help Quinn out with frequent map scouting, blinding people with "fire support" while Quinn positions herself to move in/or escape. Harrier is cool, but its another skill that just ends up feeling clunky and unrewarding. It doesn't necessarily have to deal bonus damage, though I have nothing against that. Instead when executed, it could give Quinn a burst of movement speed, or attack speed, or increased crit, or % health damage, or armor pen, or instead of marking someone for Quinn, let Quinn mark creeps or champions with her auto attack, letting Valor come down to strike the target. I really like Vault, it feels really satisfying to kick someone in the face and then pepper them with bolts, but it feels unreliable and unrewarding. I'd much rather have her get an entire new ult, instead of swapping places, perhaps let Valor fly out to track down the closest enemies with low health, like a homing missile. When and IF he reaches his target, he could deal damage or slow the target so that Quinn can catch up, maybe even make it so that you can re-activate R to have Quinn come flying down with Skystrike. This of course would briefly disable Quinn from having Valor's help while he is chasing down his enemy. Bottom line is, give Quinn and Valor a more defined role, either as an full-on Marksman, or short ranged, fighter-style top laner.
I've made up my own little Quinn rework, mostly as a form of suggestions and less so for balance purposes.
Passive: Harrier - Reworked into - Valor
While not doing anything else, Valor will passively fly around within Quinn's line of sight:
Providing extra vision above terrain and brushes, as well as increasing her line of sight slightly.
Valor will also occasionally mark nearby champions within this radius as vulnerable.
Quinn's next attack against a marked targets will deal bonus physical damage, ignoring a % of the targets armor.
Q: Blinding Assault
Click and drag skill shot (similar to Viktor's laser)
Active: After a brief delay, Valor swoops down in a line, slashing all units and dealing physical damage. Valor also latches onto the first enemy champion he hits, briefly blinding and damaging the target for the duration.
Although this spell has a brief delay, it has no cast time, meaning that Quinn can move and attack freely during the cast.
W: Heightened Senses
Active: Valor circles around Quinn in a larger radius, further increasing her passive line of sight. Granting Quinn a drastic movement speed buff for every spotted champion, and also marking them. This does not effect enemy champions that is already visible.
Passive: Attacking marked targets also increases Quinn's attack and movement speed for a short duration.
E: Vault - Reworked into - Covering Fire
Active: Quinn fires a volley of bolts in target direction, dealing physical damage and slowing the first targets that she hits. After which Valor then dives directly down, marking any champions within the same radius of which Quinn previously damaged.
R: Tag Team - Reworked into - Flush 'Em out!
Active: Valor seeks out the closest and/or most wounded enemy champion, marking and slowing if he reaches his target.
This ability has a massive range that increases with level.
The slow and mark duration is increased the further away the target is from Quinn.
While Valor is traveling, Quinn is granted a massive movement speed boost for the duration that he travels, plus the duration of the mark. However, Quinn loses all of her abilities for the duration that Valor is traveling (currently marked champions will remain marked).
If in danger, Quinn can re-activate her ult by pressing R. Which quickly calls Valor back to her side.
Demacia needs heroes... 
and
pre-rework. As people played her though they realized that with the short AA range, a slow moving/casted skill shot, and her two other abilities (including her ult) throwing her into the heart of danger perhaps another role would work better.
!) Not Jungle, she can clear and gank well but not safely or efficiently enough. And so she was banished to Top Lane, set to go toe-to-toe against the likes of
,
,
,
, and
. In the days when a Top Lane
or
could carry his team Quinn was there. However the the landscape of Top Lane has changed very much since S3 with new champs, items and reworks, not to mention the updated Summoners Rift. Yet the only thing that's been touched on Quinn are tweaks to her E - Vault. And honestly...I'm kinda OK with that. Like I said, so many things have changed top lane and though she's very much the same as she was on release she hasn't lost much of her effectiveness. I love her as a niche counter to most Top Laners, like Kennen, breathing life into a stale TP Top Lane meta.
's stealth I assume? Love %ArP! "While not doing anything" is important, would that include Q?
's Ult with
's ZAP! I could like it on another champ but I don't see it fitting Quinn, at least the Quinn as she exists now. If the goal is to turn her into the true Bot lane ADC she was meant to be I do actually think this could work for her, however that would kill any hopes she had going anywhere else. With the blind vs monsters removed she couldn't jungle and without Vault she would be like Jinx trying to go top but worse.
As for the Ult...it seems really limiting. This reworked Ult can only hunt down weakened enemies that trying to escape so you can catch them and shoot them. Just like her Ult now. But this would make it useless in any other situation, no more clutch escapes or lightning quick flanks. I can imagine that your first attack would deal some bonus dmg but I feel the versatility of her current ult is too great to lose even if its not in line with what most ADCs want.
or tanky
. Not pre-rework
either. I feel Quinn is fine where she is and it would be neat if she had more of a chance bot but if I had to choose between the two I'd stick with top.