They should diverge even farther from the 5E rules. Just about little annoyance I have with this game stems from the 5E ruleset and the things where I've thought, "oh that's a cool thing" have been divergences from it.
It sounds like you just don't want to play a game based on 5e. This argument is like playing Halo 3 and saying "Can you take out all the stuff that makes it Halo 3 and make it more like Call of Duty Black Ops?"
I feel like the game you want already exists. It's called Divinity Original Sin 2.