maybe the solution is making vaders death more emotional by building up his turning, so his death is a bit more sudden and an anticlimax.
what if.....vader force pulls luke's saber, and stabs the emperor from behind. (what could follow is that uneasy silence that followed dookus death). redeemed, anakin goes to help luke to his feet. suddenly a huge wave of lightening pours forth as the emperor makes one last dying charge at them both. vader forces himself against the waves of lightening, grabbing the emperor and falling over a drop with him. luke could cry the generic NOOOO!
vader would not die because of the lightening, but because of the fall perhaps? enstead of being in a hangar, luke is at the bottom of this alternative pit?
alternative vader footage would be doable i should imagine?