I'm curious on who's getting a nerf and who's getting a buff in the next upcoming patch.
In my opinion
I think Kayle needs a nerf, because her top game is too strong. She has a bit of sustain, but tons of harass. She can stop a lot of damage too. So anyone/anything that deals good damage all at once gets screwed which puts a lot of champions in it. Besides a few like jayce or yorick. They have good harass, and they can continue the damage. Kayle also has CC, so she just flies over you and rains fire on you. Especially with tiamat it's pretty crazy. Stopping 3 seconds of damage could be the difference between dying and killing someone.
Kha'zix is pretty strong at the moment especially as an assassins. His escape/gap closer is crazy. Plus he has high burst. He doesn't need a huge nerf, but just a tap down a little.
Champions that need buffs
He's been out of it forever, and Riot has done nothing to fix him. He's kind of like evelynn, but 6 months ago. Useless and just a troll champion. People will deny it, but look back at how many rammuses do you see in games? Not a lot. If not the least. Rammus needs a pretty hard push right now, because he's been ignored all of Season 2 practically.
A good amount of the game wouldn't even know what trundle looks like. He gets no playing time either. Not sure what you can buff on him, but he needs some type of push.
After Season 2 ended and ADCs got nerfed a little bit. I have not seen a corki yet. I think he needs a little push on his Q or R. Lower the CD on his W a little bit by like 2 seconds. A little push can get him back into the game.
I remember when he was really strong back in mid-season 2. He used to be extremely dominant, but now he's not even played at all. He needs something to push him, because he's completely out of it.
Disclaimer: This is from my point of view, and it's not any hard facts, but from what I've seen these champions aren't played very often and being ignored. I understand some people will say "well just because they aren't played doesn't mean they suck". Well why can't someone explain why they aren't played? Cause they just aren't isn't a good answer. Though sometimes it can be a mental thing. When rengar was nerfed I played him perfectly fine. Just the community over hypes every single nerf/buff. People complain like crazy, but I played jungle rengar just fine getting first blood in season 2.