They are bent on making the game more and more crunchy for some reason. Which, for a second playthrough or whatever, awesome. For a newcomer every boss feels incredibly difficult puzzle and you need to somehow master every single combat mechanic to get an edge over these new bosses.
I'unno, I feel like getting to a point where you can steamroll dungeon run isn't hard once you've gotten your feet wet, so boss fights being Persona-style puzzle fights is actually neat IMO.
edit: TBF I'd feel a whole lot differently if the tooltips weren't good or you couldn't right-click to see a boss' entire statblock and abilities.