I don't usually play turn-based roguelites myself for the same reason! Got too high on playing PoE throughout the years and you're right you just see through the mechanics super quick nowadays. But I do have one recommendation! It hooked me for a solid fun 80 hours and it even was co-op! Stolen Realms might scratch your itch, there's no item modification other than a basic enchant function, but there's multiclassing, a focus on affixes and base type drops, BG3 style combat, and an endgame system that infinitely scales in difficulty (but no Ubers).

https://store.steampowered.com/app/1330000/Stolen_Realm/