I just saw the movie yesterday. For some reason it seemed like in some of the outside panning shots into and around the bridge window (and other exterior areas) I got the feeling that they may have tried to visually reduce the size of the Enterprise by about 10-15%. Just seemed a little smaller to me overall.
Also, did anyone notice a change in the design of the ship at the end of the movie?
I'm sure there's more, but I'll probably have to wait for the disc to find them.
Well, the impulse engine is just bigger now.
But I got the impression that the bridge deck looked taller after the refit.
It's still a design change.
That could be where the sense of smaller size is coming from for me.