wow, I just noticed a minor thing which I'm sure has likely already brought up. When Luke is in the bacta tank a droid attaches something to the glass, there's a fast cutaway but when we see it again its no longer attached to the glass.
Not a big deal either way though. Just spotted it while re-watching Ady's ESBR preview. Plus I know this section of the film is pretty much complete except for the new wampa.
It's also possible the droid arm quickly retracts during the cutaway.