Miss Fortune. Why the heck do her abilities scale off AP (especially her ult) and why does she guzzle so much mana. Also, the ability to manipulate her double up shot to go where you want it is extremely complicated.
I dont see the problem with her abilites scaling off ability power as well as ad, and i dont think her q is too complicated at all, I read the wiki and understood in no time. Still I agree she is in a bad spot. Right now ADC's that lack a mobility skill tend to have massive advantages to compensate. Jinx with her absurd damage, Ashe with her vision and lane control plus great ult. Only thing MF has going for her is a pretty good ult for teamfights which is really not shining in this tanky meta at all.
Twitch. When I started the game 3 years ago Twitch was one of the better ADCs. Now he is arguably one of the worst. He has short range, very low hp, and an unreliable escape mechanism.
Same problem as MF, sure he has a great teamfight ult and highest attackspeed i can think of in the game, but it's just not enough to make up for his weak laning phase and his immobility.
Warwick. Great noob jungler. But pre-6 its almost like not having a jungler due to his lack of mobility, lack of crowd control, high mana costs and poor ability damage. He farms and that's it.
Pre 6 is the first 5 minutes of the game only, and some champs dont shine there, it's a key part of having champion diversity. WW is unquestionably one of them. Fortunately he is able to farm to 6 in even less time than some. His ult is borderline ridiculous and he is a monster late game. I think he is in a good spot and I dont ever want to go back to having ww jungle one shot me every game regardless of what role i play and how well i do in it like it was when new jungle items first came out.
Twisted Fate. Picking him is like asking to lose your lane. He has no opponents who he has a favorable matchup against and he has never been a top tier pick. He has a crappy early game and an equally crappy late game. Something is not right there.
TF had a 100% pick/ban rate in OGN champion spring 2013 (the most competitive league in the world by far at that point in time) so I really dont know where your coming from with that statement. Losing his global gold passive was a massive nerf however and he is not that great now. I think he could use a slight buff, like a short speed boost when he selects with his w or something, but his ult can totally dominate games and think riot is being intentionally careful not to let him get out of control.
Elise. This pick was predictable and probably the most deserving champion on the list. She was pretty strong maybe two years ago, but ever since they changed around how her spiderlings react upon her landing on the ground she is no longer as strong as she once was.
Elise was nerfed to the ground. Ok she was nerfed through the ground and straight to hell. She has the lowest win rate of every champion by a significant percent, currently sitting at 43.59% win rate, almost .5% lower than the next champ. Her current level makes me question riots ability to balance champions significantly, especially the quality of life nerfs they stacked on top of everything else such as lowering spiderling vision. I think an elise main must have pissed off Morello because there is no logical explanation.
Aatrox. He is touted as an immense lifesteal-centric champion yet he doesn't feel like he life steals as much as he should. And you can work so hard to max out your blood well to get back what... 1/4 of your health on reviving? He should at least get enough health back that the enemy can't just ignite him and run away to secure the kill. That's poor counter play.
Vayne's passive gives her 20 ms, and only in a very limited circumstance. For a passive aatrox is not doing bad. When I play aatrox I regularly have people comment that my lifesteal is absurd. He is a champ that falls of hard when he gets behind not being able to get enough damage to be a threat or enough tankiness to survive but I dont think he should be in the top 10 of champs to buff, maybe a slight base attack speed buff.
Olaf. There is something called Olaf tier that exists with Olaf in it. It's pretty low on the ranking ladder. I think he was a pick/ban back in season 2 but I wouldn't know since I joined after that. I think he's due for some attention.
I don't enjoy playing him, but boy does he seem to faceroll if played well. Still he is one of the least winning champs and i feel like he could just use some better base stats and base scaling cause everything he's supposed to do he does fairly well if he doesn't get shut down in lane.
Malphite. I find him to be mana hungry. He has a very impactful ultimate... but it isn't up as often as some other hard engage champions (Leona, amumu, Annie). His shield takes forever to repair itself and his damage output is abysmal, especially against ranged targets.
He has a 51% win rate and one of the best ults in the game. It's way better than leona and annies ult, and way less predictable than amumu's. I played vs a support malph and was surpised by how much his q poke did with no AP. I cant agree here.
Soraka. She is a heal support that lacks damage output. I do like the revisions they made to her Q and the introduction of hard AOE CC to her E but the travel and activation times on these spells are so darn slow and too easily avoidable. Something needs to be done.
Again over 52% win rate. Her q is only easy to dodge at long range, where she is taking no risk, and if you use it when the adc is farming it's pretty much guaranteed hit or you deny farm even better... her healing potential is absurd to the point where she is often focused in teamfights. Her E is extremely strong for disengage and chaining after other CC + it's a silence. Her ult can change an enemy first blood into an allied first blood and get you numerous assists throughout the game. She is currently one of the winningest champs in league and i think you just need to practice with her a bit more.
Rammus. I actually don't think he's in a bad spot right now but he has just never been an OP champion. I guess thats both good and bad that he's one of the few champions who have remained balanced for all these years.
He was in top 5 winrates in season 4, and is still a very viable CC tank who's ganks are almost 100% kill if opponent extends to far and you dont gank when minion wave is blocking your q. He isn't that dynamic, kinda like warwick and malph: he is really good at what he does, it's just that he doesn't do much else.