Totally aggree!
1 level up makes my whole gear "useless".
You totally loose reference to your items. I can't remember one name of a unique or epic, or legendary item I found, because it's obsolete a few minutes later.
I spent more time managing items in my inventory than playing the game.
To counter this I use "Reduced Number Bloat", which makes it a lot better! but I already tend toDnD like scaling... But haven't tried it though.
https://www.nexusmods.com/divinityoriginalsin2/mods/58/?
Moderate Scaling: D:OS EE-like numbers, hopefully achieving vitality in the 1000s by end game (12 +16% vitality per level)
Reduced Number Bloat: Massively reduces numbers, down to about 500 base vitality at level 20 (10 + 10% vitality per level)
DND-like Scaling: Even more massive reduction numbers, granting 4 + 4% vitality per level, leading to around 200 vitality by level 20 (I think).
No Scaling: Vitality increases by virtually nothing on level up. It also virtually eliminates the penalty for equipping high level weapons. It definitely makes for a very different experience, where level difference is mostly a non-factor, which is pretty interesting.