I'll have to dig out the DVDs to check but IIRC there were some comments about the wampa on it, about how not really seeing it produces a bit more suspense. But I agree with you on that one, seeing it upped the stakes by showing it as something for Luke to be scare of.
****
Talking of Special Edition changes I'm sure I remember a comment from Mark Hamill somewhere - "I wish they could've digitally redone my hairdo."