Chewie was definitely given several moments. Unfortunately for me, and many others I know, he was out of character in those moments. And he didn't look right. And he didn't stand right. And he didn't move right. But more than his appearance and locomotion being significantly off, he acted out of character in all of his big moments--the light moments and the heavy moments.
The Wook
I suppose it is inevitable though that due to Peter's declining health and agility that a new person would have to inhabit the suit. In the opening night theater Chewie's moments got great laughs of approval. I'd hazard to say he has never been so popular as he was in this film. As a fan of the character, surely that's a good thing.