That idea actually has some narrative potential — if Han came out of the carbonite having lost his strength and confidence, it could do a lot for his character — so long as his arc for the rest of the movie was dealing with it, regaining what he'd lost and developing as a character that way.
The movie as it stands only does the beginnings of this. I'm not saying it has to be done, or that it even could be done, but it would be one way to try to improve the film.