Dinobot is ok. I have the Henkei versions of both he and Cheetor, but ultimately he's too small.
As for Cheetor, both modes suffer from the same thing - the gimmick. The jaw opening mechanism is far too cumbersome for such a small, thin figure. Doing away with that would be a great start for that mold, but there is still quite a bit wrong with it.
The point of these Generations figures was to get as close to screen accurate as possible, at least in robot mode. Cheetor and Dinobot were never designed to be that.