The whole part about going through as two parties, stepping on switches, etc., and I used to enjoy it on Steam version.
But what really kills the fun of this dungeon is the enemies. In most versions it seems you can't even run from the Faces and Necromancers and they're the toughest and it's not fair you can't avoid fighting them, since Faces counterattack with 1000 Needles and Necromancers use Demi for major fractional damage. With your stronger party they might be manageable but the weaker party not so much.
Kefka's Tower, despite being the final dungeon, is much easier and more fun, except for the indoor enemies who use Blaster to insta-kill the whole party.