Yeah I need to figure out the outfit thing. There are some things that are definitely pretty cool about these labyrinth dungeons, but these are some pretty major negatives:
As mentioned above, they are super long
Switching stuff is really annoying (especially magicite since even if you optimize itll be in the wrong order)
Inevitably youre eventually going to forget to switch stuff, and if you do you might just not even have stuff equipped in some slots because you were using it for another team for the previous battle (for the last set I was just swapping my historia crystal and I accidentally went into a fight with my C team without one... thankfully it was one of the easiest possible bosses in that dungeon, but if it was one of the harder ones it probably would have been a wipe)