I think you are right about the camera trickery employed in the scene Asteroid...

I have also wondered about the arm swipe thats been reversed (played normally and roto in) could be used to show a light sabre coming in to frame briefly before we see the shot of the arm fall on the floor severed to make it more visible what is happening...?

I think your right it looks weird the shot but it is passable. I totally noticed it.

The shot prior to this one is worse I think (only my opinion so don't bash me)

I was wondering if it could be zoomed and do a pan or something to make it look better or just to lose this one perhaps....Not sure if this one is specific to the SE or not or it contradicts the SE additions?

as it actually seems like he is approaching from a different point when we first see him loom into frame when luke cuts himself down.

sorry to say it but although the wampa cave is iconic I think it is perhaps the worst scene in ESB after watching it a lot of times it fell apart in many ways and I am normally pretty lenient with stuff...(special edition mind)

I don't hate it at all, just would actually love to see it work a lot better in general

That also said I have not seen the GOUT of ESB in so many years now but I do miss the shadow on the wall and hope that makes it back in for revisited.