That’s how I felt too, smpearch1981. I don’t mind the scene being where it is, so it’s not a pressing thing. Just seeing if it goes better being first.
I think having any establishing shots of Mustafar’s landscape be place right before the main chunk of the scene would help. He leaves the helmet, and we see an establishing shot or two before the slaughter begins.
If the TFA teaser shot gets used, and it sounds like it may not be as feasible as it did, it should be couched between two establishing shots.