Ok. Armor class is not a "system"; its a term.
elderscrolls also used the term but it didnt work the same way.
Diablo 1 has been a while forme, but i dont recall attacks beeing hit or miss based on armor class.
as for spell slots, well yeah, spell slots ultimatley are a pitfall of DnD, AEDU is a MUCH better syste than spellslots, but it was discotinued because nostalgia laden grogs sperged about it.
Still, its dnd, so it might aswell have vancian casting, i personally think cooldowns downt work either.
DnD needs a specific system to gate access to spells.
That beeing said, resting is a big problem of CRPGs, it already is a problem on the gaming table i can tell you that for a fact, and in a video game, its even harder to implement without the players able to cheese it.
Anyway, for what its worth , diablo 2is all those things, primarily, i wouldnt say that baldurs gate hangs on its 2e inspired system.
