While I strongly support Riot's decision to give every Champion in the game a unique strategic niche, I think they might have gone with the wrong one for Quinn.
Out of the options available, Twitch was the marksman they chose to be the most assassin-like carry of his class, giving him changes in both Preseason 6 AND Preseason 7 to support this.
While I think it's cool what they've done with Twitch, I feel Quinn was a MUCH stronger candidate to become the marksman-assassin; it was written all over her old kit and STILL written all over her lore and voicelines.
Assassins are described as "mostly melee [characters that] must put them themselves into dangerous positions in order to execute their targets ... Luckily, they often have defensive tricks up their sleeves that, if used cleverly, allow them to effectively avoid incoming damage."
C'mon, an AD Carry whose ultimate made her melee for 20 seconds, was forced to vault into dangerous positions and had an execute to finish off her targets along with an AoE blind to avoid incoming damage? To me, it should have been a no-brainer to make Quinn the premiere marksman-assassin--Twitch very well could have been the marksman focused on poisons and DoTs whose gameplay revolved around spreading the plague.
Instead, they chose Quinn to be the roaming marksman (forget that Corki or MF could have fit the role better thematically or mechanically) and removed the most fun and unique ability that Champion had to offer: Tag Team.
Not to mention Quinn being the best roamer very nearly pushes Talon out of the game and gives him no reason to be picked since she can traverse the map twice as fast as he can while having more uptime and range with which to assassinate priority targets with ease and safety. I'd go so far as to say an ahead Quinn will even 100-0 a squishy faster than Talon can due to the new delays in his abilities. Where does this leave him?
Even if Riot was dead-set on making Quinn the speediest marksman, I don't think it was necessary to remove her ability to play as Valor in order to accomplish this. And that, I think, is the one thing most Quinn players sorely miss. I've said it before and I'll say it again--you don't take away Gangplank's oranges, Shyvana's dragon form, or Shen's taunt when you're updating them. As odd as it is for a pirate to eat citruses to cure himself or for a ninja to throw himself into the fray to grab everyone's attention, those are the things about those characters that players have grown to love about them, just like Quinn players loved Tag Team, as odd as it was for a falconer to jump out of sight and allow her bird to fight for a while.
With all that said I'll end on this note:
"Quinn and Valor's unbreakable bond is deadly on the battlefield, leaving opponents ravaged and riddled with arrows long before they realize who they're fighting: not one, but two Demacian legends."
