Hey SWOTFAN25, I thought about your idea of building the plot around Luke and using him to connect the eras.

Maybe you could start the movie with Padme telling Anakin that she is pregnant (and maybe add a Fellowship of the Ring like prologue), then focus the narrative on her and cut the Mustafar fight out.
Maybe the “Seeds of the Rebellion” plot could be used here, although the turn of Anakin (from Padme’s perspective) should be focused.
After her death and the Tatooine-Sunset-Morph, which sounds amazing, the plot of ANH would continue as normal and you could add Flashbacks of the Mustafar fight to the Obi-Wan vs Vader fight from ANH.

Anakins turn from his point of view could be added in-between ESB and ROTJ to avoid the Han-in-carbonite problem (just let the rebels save him offscreen and show flashbacks to the Prequels).