GoldenEye 64 was just a little bit too advanced for me when it was released (I was only 8 at the time), so I can't say much in the way of how good or bad the game was, but the idea of replacing a former Bond actor with a current one in one of his established Bond films seems a bit cheap to Brosnan.
I'm sure for those of you who like the game, it'll be nice to play the game again with sharper graphics, but to me that's a really cheap trick.
The worst thing is that Craig was probably contractually obliged to be in this game. How could he possibly be enthusiastic about robbing another Bond actor's performance?
Brosnan didn't perform in anything in GoldenEye 64 though. He was just represented by a blurry mess of low res textures, and text as dialog. It's not as though he put his heart and soul into it- he probably didn't even know about it until after it came out.