Sordak, he mentioned spell slots " Mearls admits. “You [indicating Vincke] have talked about how spell slots might not be the most intuitive thing"
https://www.pcgamesn.com/baldurs-gate-3/dungeons-and-dragons-6th-editionAnd i see a lot of similarities. Jay Wilson discourse sounds like "Diablo 2 was a good game, except by character progression, itemization, combat, resistances, immunities an everything else" is no different than "Baldur's Gate 1/2 was a amazing game, except by missing, spell slots, leveling and everything else"
Keep in mind that even Diablo 1 and Might & Magic used Armor Class system.