Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Attributes Modification - GameplayOverhaul Project

You can just make your changes in the data file and then place that into your Public/YourMod/Stats/Generated/Data folder and the changes should overwrite.

You're trying to disable a bunch of hardcoded features (saves, magic pouch), so don't think you're going to have much luck with that, or you're going to have to do it in a roundabout way.