Mmmm hard to go by memory but...
Characters are absolutely flat, devoid of any personality, underwritten and try too much to be cool (Balthier being the worst offender). They also have no meaningful development at all. Story makes no sense (hey, we have a HUGE FUCKING ARMY OF GIANT FLYING SHIPS ARMED TO THE TEETH but the most important thing is finding some stone that it's basically a single nuke). I don't remember much, but I spent my whole playthrough thinking "THIS SHIT MAKES NO SENSE" over and over.
As I said, I liked the artstyle (it's really great!), the world building and the exploration was great. Combat was ok-ish, but I'm not fond of RT (full or partial) in Final Fantasy games.