On the Odyssey I think it's plausible the bridge could be that big. It seems decent to me, but not altogether impressive. However, I rarely visit the bridge. Then again, I probably won't even be using the Odyssey so it's sort of a moot point either way to me.
As someone noted in another thread, one of Roddenberry's design mandates only broken in Generations was that all Enterprise bridges be the same width regardless of ship size.