Equipment changing comes up -constantly- one way or another and the very idea of impeding equip changes in a fight-per-fight basis is downright stupid, especially considering how the general dungeon design feels tailored to consider equipment swaps. That's not even taking into things like equipment dynamic changes that could happen in the middle of a floor and swap general stat dynamics, like Raquel's midgame offense spike with Macha Brand and Mia's speed jump with Wind Cane. I cannot fathom why you wouldn't allow equipment changing in the middle of the floor, in-between fights, and I never followed that particular guideline because it was so egregiously dumb. I honestly haven't seen it enforced in any way either, and people don't seem to take it to heart, so, if nothing else, the static equipment clause should go away and never turn back.