The XBC2/3 fandom's woes are not unique. It was one of many properties that blew up in the age of tumblr/reddit/ discord and when the woke schooling was in full force, aka when forums died and retards took over. Countless other franchises fell victim to this such as RWBY, Persona, Fire Emblem, Final Fantasy XIV, Trails, Pokémon, etc.
I thought that the setting of XBC1 and 2 was very imaginative. It's the world of floating islands from Granblue, but the islands being living creatures that can talk to, can move, can fall sick, have innards you can trawl through, etc, has much more potential with it. Shame it was discarded in the third game for a typical flat landmass. I also thought it was a waste that the mechs were never pilotable. I quite liked how they were huge, very high level mobs placed in the middle of zones that you would have to navigate around like the Fel Reaver in WoW, and you could come back later and fight them.
First half of the first game is very good. The story is tense and engaging up until you reach Prison Island, after which it descends into typical "kill god with the power of friendship" JRPG bullshit but at that point you mind as well tough it out and finish it. The combat and sidequests are mediocre. Soundtrack is okay, some memorable tracks but few compared in proportion to the sheer size of the OST. The English voice acting and the cutscene direction of the first game really carried it. The sequels are not as good for various reasons, one of them being that the English dub is nowhere near as good.