I've noticed that Bradley Cooper barely gets talked about. I thought his voice work was great. I was one of the people that wanted a cockney accent for the role.. But I can't imagine the drunken scene having the same emotional effect on me if Jason Statham was the voice actor lol.
I was surprised to read he was the VO for Rocket. I thought he did an excellent job, i don't think i would have guessed it was him if it wasn't for the credits. very different from his usual characters.