Okay, think I'm done. According to the 3DS counter, I'm at 65 hours, and I've got 100% maps turned in and just the final superboss left. Well, that and conditional drop hunting plus killing the remaining FOEs, but eh. At this point it would largely come down to either stupid grinding or buying the grinding dlc to copy somebody else's cheap strategy, so think I'll just call it done instead, as it's just one boss, and when I did that for V, it felt more like a pain rather than a well earned victory. (I beat 1 and 3's also, the latter with some cheap Ninja spam trick IIRC, while I've never beaten the ones in 2 and 4, but I'm not too upset over that.)
Overall... I think I'm net a little disappointed, as something about the game felt kinda half-baked. Especially the labyrinth variety near the end, which just sort of killed the momentum, but I don't think the pacing was really right either. Just feels kind of half-baked/not all there, like IV (which is my most meh in the franchise, aside from EOU story mode). Still not a bad game, mind you, but I think it falls on the lower end of the franchise for me, especially since quite frankly, they straight up messed up the curve with the bosses for Labyrinths 12 and 13, which would have been way better if you straight up flipped them (not thematically, just in terms of difficulty.)
Edit: I forget, how does Guild Card junk work? Any chance that can be used to cheat my way quickly to a party that can win, or not really? Because that's really the only way I see myself doing it.