They rushed the seasons because they were ready to do other projects, Star Wars or not, they rushed the seasons to an end when HBO could’ve easily let them walk and gotten passionate runners who would give HBO the 10 seasons they actually wanted
That goes against the entire ethos of HBO. They’re always going to trust their writers/showrunners, sometimes to a fault. Sometimes that gets you a Deadwood, sometimes it gets you a John From Cincinnati.
Personally I prefer it that way. Much rather that than normalizing the idea of an executive dictating stories. I’d rather HBO not become Disney.