I feel like the republic governing model is still somewhat around, I doubt the emperor didn't heed some of the wills of the political parties that we know do exist, they have power and I'd expect that some ideals of the republic still exist. Ultimately, I'm not convinced that mass liberation and Garlean reformation will be the endgame I think reformation will happen but I can't see all the territories becoming independent that's like a power vaccum waiting to happen but hey idk just theories afterall