[/LIST] I feel like there are easy and obvious weak spots on all these characters that should be tuned up to bring them more in line.
Ryze: Make rune prison a stun again
Mordekaiser: Make Q actually decent.
Jax: Just revert a few nerfs.
Malphite: Lower ultimate cooldown to Ashe's ult levels. Also, increase his base stats. He should be getting over 100hp per level like other characters with bad spells.
Blitzcrank: Remove the movespeed penalty from W.
Olaf: Make Q easier to hit with, make E scale better.
Corki: Improve his range a little, fix mana cost increase rate on Q.
Fiddlesticks: Mana costs and movespeed can both be reconsidered. Also, they need to fix his last-hitting ability, because he can't lane as is.
Kennen: Just change the passive part of W to deal damage=AP every 5th hit (current effect doesn't make AD or AS remotely viable.)
Eve: Her ultimate currently makes no sense. She also needs a close-out move so she can still participate against oracles.
Kog'maw: Kog'maw is such an easy kill that people just hunt him. Redo his Q to be a life drain that temporarily steals armor and adds it to Kog'maw.
Trynd: Let him remove ignite and other DoTs, either through his ult or through bloodlust.
Cho'gath: Make rupture a little quicker.Mundo: Let him remove ignite somehow.
There will always be champions at the bottom of the barrel, or else there wouldn't be a "Tier 4" or "Hard to place" category.
Nonetheless, I love some of those changes.
I asked about a week ago, didn't see a response. What justifies TF being in high-mid Tier 3? He seems like a Tier 4 hero, if not unplayable in his state. AD is bad post-nerfs, pure-AP is bad due to ratio's, and hybrid is alright - but requires a lot of kills/farm, and even then he's just a mediocre glass cannon. Do you ever see him in high ELO?
Lastly, I mentioned this about ~2-3 weeks ago, but I still believe Olaf should be bumped up a bit (as does others) =P