How could the PT be rescored? I've been hearing some OST lately and I just realised that unlike the OT, PT mostly lacks of leitmotivs, which made the OT so particular. So while I was hearing, I thought well, there's a lot of material there, why not to just set it up in a different way:

Duel of Fates could be the Good vs Evil theme.

Battle of the Heroes is way too monumental for a duel, it could be the Jedi Order's theme (and in a minor way, ObiWan's theme)

Across the Stars well, it already is the love theme for the PT

Reccuperate the SW main title's melody as a leitmotiv inside the movies (It was mainly used in ANH, like in the bridge scen in the Death Star)

The Emperor's theme should be more present

Establish the Imperial March only for the Empire (cut it from AOTC)

Republic/Senate should have a theme (not a march).

And once you have it all organised in your mind, start experimenting with the music. Like the choral part of battle of the heroes in the order 66 scene, or even leaving some scenes unscored (someone posted a video of how would the duel of Anakin and Obiwan look if it was musicless