Moth3r's laserdisc transfers are quite good, so looking for a few extra frames of footage from some documentary rarely makes any difference ... but I do always look.
As far as lightsabers go, I never go back to laserdisc for that, I use chromakey and fix them myself, from the DVD versions.
>>Also, have you noticed a significant amount of cut material from the Jedi Ghost scene?, it seems shorter to me....I could be wrong here but I remember Luke "winking" at the Ghosts as he turns away...
In the special edition, the shot of Luke looking at the ghosts and then being called away by Leia, waving to them as he walks away, is split up into two shots, cutting out some of Luke's reaction and generally turning the whole thing into a choppy mess.
So yes, that's what you're remembering.