Idk why you guys think the final battle is so complicated. While yes there are four different storylines, they all basically amount to “everyone fights the droids while infiltrating the palace and hoping the air force can take out the control ship to make the infiltration trivial easy”. Ultimately the battle hinges on Padme’s party and the pilots, with the Gungans and the Jedi going off on tangents only to give her party a chance. Plus plenty of SW films have done intercut battles. Remember Exegol, Endor, and Starkiller Base? It’s really just a function of wanting the climax to include a ground battle, air battle, and lightsaber battle.
But if the Gungan battle is just a tangent, why is it necessary to have it be a major plot line? That was the main reason for the final battle restructuring: it focuses the climax on the most important elements, rather than wasting time on pointless droid fighting. Intercut battles have been a thing in Star Wars, but never 4 battles at once: Endor had 3 battles, and Starkiller and Exegol only had 2. Simplifying things allows for the audience to have a clear “hook” to be invested in.
Oh and while the execution is seamless, I don’t like the idea of Jar Jar being a planetary representative from the start. It robs him of his entire arc from lowly buffoon to much more important buffoon and redemption in the eyes of his people. If being a buffoon is the issue, this doesn’t fix it, it just makes him a bumbling authority figure like Marcus Brody in The Last Crusade.
I don’t think Jar Jar being a representative is the only change Eddie wants to make: he’s also going to replace several other pieces of dialogue throughout the movie, to change Jar Jar from a bumbling bufoon to a character with actual agency. Things don’t just happen to Jar Jar in this version, he actually helps the protagonists with their mission.