I feel like that would be overly convoluted. Imo the climax should all take place in one general area. The throne room is already disconnected from “destroy the station” in the original cut, having the throne room take place on the other side of the galaxy would mean it has 0 influence on the main plot.

I think that the Emperor should be on the Executor, as he is displeased with Vader’s failure to destroy the rebels. That way the rebels can be trying to take down the factory and the Emperor (using some planetary laser on the factory or something). I think this would be easier to follow. Maybe the emperor could be using the force to “shield” the executor (so his death means something for the rebel cause).