An even more fundamental problem with this direction has occurred to me which I'm assuming will be completely glossed over: Cersei isn't really a villain to anyone except the show characters at this point. No one outside the North knows or is going to believe what happened with the Night King and they were already a tiny fraction of Westeros' population to begin with. The Lannisters don't exactly seem to be terrorizing the general populace any more than other factions. They don't keep slaves so there isn't any appetite for an uprising like there was when Danerys came to Meereen. Aren't Jon and Danerys just a couple of assholes with a horde of migrants dragging out an endless war to the rest of Westeros now?