Interested, but I don't just want the setting ported to 5e rules. I want Diablo style item generators with affixes, and I want powers that use mana, or have round-based cool down effects. I don't just want reskinned 5e.
It should use the same basic rules framework as 5e. Just dump the spell slot paradigm, daily powers, and the entire concept of rest as a recharge mechanic. It should play like a tabletop version of an action RPG. The dungeon diving shouldn't stop because you are out of spells. That shouldn't even be a thing.
And don't be afraid to give martial characters similar abilities. Give martials more than just here is some bonus dice, or you get a couple of extra attacks.