I'm not a revision patient, but at over four years out I can eat anything. Even at two years out, I could eat anything. Most of the restrictions and food intolerances are in the first few months post-surgery.
as far as volume, you can eat more and more as time goes on (although just because you CAN doesn't always mean you SHOULD). Right now I would characterize myself as a "light eater". I highly doubt anyone would guess I've had WLS (whereas early out, it was obvious that something was going on). I eat normally, but fairly lightly. Not any different than my regular weight-conscious, normal weight friends eat, really. If I go out, I typically get an appetizer - or a salad - or I'll order an entree and bring half of it home. Most of my naturally thin or weight conscious friends do that, too.