Not too many people needs a buff. I can say Sir Dan needs a little buff with some of his moves and speed. It does not make any sense for Fat Princess to move as fast as she does as big as she is. She cant even move herself in her own game.
I can name alot of characters that needs a little nerf.
Level 2 - increase speed and blast radius.
Molotov cocktail - change ap on direct hit from 5 to 10
Dagger throw: change ap from 10 to 15
Slightly increase the range on chainsaw spin, and ground pound.
-jak and daxter
-ratchet and clank
Why would they nerf Cole? He is easily one of the more balanced characters in the game.