Maybe the post-Republic faction could ally with the First Order Remnant and the Chiss to drive back the Grysk, for example. Following the restoration of the Galactic Empire as the Fel Empire, the Alliance and Empire coexisted in relative peace. Incorporating most of the known galaxy, the Galactic Alliance was the first government to achieve this since the Galactic Empire. I think this would open the galaxy up to much more complex interactions going forward, instead of just Rebels vs. The Galactic Federation of Free Alliances but more commonly the Galactic Alliance, was the galactic government directly following the Republic. And maybe then you've got the other groups - Nikto Space (formerly Hutt Space), the Chiss Ascendancy, the Grysk Hegemony, the Independent Sovereignty of Ryloth (just spitballing here), with Rey's new Jedi Order as a neutral group who serve as arbiters between everyone else, as the Jedi's bond to the Republic is one of the things that led to their downfall in the Clone Wars. The Galactic Federation of Free Alliances, also known as the Galactic Federal Republic, but most commonly the Galactic Alliance, was the galactic government. Then you've got the remnants of the First Order and Centrist space, preferably led by a Pellaeon-esque 'moral Imperial' who is open to collaboration and co-existence with other factions.

I'd love to see the galaxy be split into smaller states or independencies - so you've got your post-Republic democratic faction led by Chancellor Poe Dameron or whatever, which is basically a smaller but much more consolidated Republic that doesn't try to force its rule upon the entire galaxy like Mon Mothma's New Republic did.

Galactic federation of free alliances