--Plus, the scene with Han, Leia and Chewie walking around inside the space slug is quite unrealistic to my standards; you should remove the mynocks and the three walking around inside the space slug, and leave it to making repairs inside and the shaking as the TIEs drop their bombs.

--The space slug is not very impressive either, but it looks more like stop-motion to me; better smoothen it out.
-Or maybe you could have a new shot, with the falcon approaching the camera and the space slug behind it. What do you think?