My limited experience with FFG Star Wars was that if you replace most/all rule-referencing with just using the rulebooks from one of the Starter Sets, then it plays much better. Only go to the bigger books for character-facing specific traits. But overall, I just didn't stick with the game past a couple tries.I loved the basics of FFGs version of star wars, if I could find a lite version of the genesys system that did away with all the charts and extra stuff, but just kept the basic rolls, I'd play star wars with that system.
Funny thing about the "use Cortex Prime" argument is that it's "LEGO-like" structure allows you to build the game you need for the themes you want, so they could much more easily pull off the 3-rule books for different campaign types model, but they'd also feel a LOT more complete. Supplements would be more about adding new mods, character options (in the form of SFX particular to the mods), and then just loads and loads of lore, GMCs, and ship stats. Exactly what I wanted FFG SW to be, but wasn't, because fundamental aspects of the game for the campaign style I'd want to run were squirreled away in different rulebooks and supplements.