#1 - Looks like ROTJ Mark to me.

#2 - He doesn't even get the glove until after the fight at the Sarlacc, when his artificial hand gets shot and the wiring is exposed. He would NOT have had the glove on in this scene.

#3 - Show me a picture of this prop, I've never seen it

#4 - It doesn't look "prequel style" to me at all. The lightsaber ignition shot reminds me of Vader lighting Luke's in ROTJ, and the shots of Vader walking to his chamber feel just like ROTJ.

I do agree that this scene was cut for a good reason, though.