I think my post fits here better than in the other thread, so I will link it:
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=879089#Post879089But in general:
Divinity original Sin 2 has a MUCH better combat system. I think there is not much point in thinking how to improve/balance BG3 combat, instead simply replace it by the divinity 2 system and you are good to go. You may add some things that are an improvement to it, eg. a limited and balanced use of concentration spells is ok and I like that moving 0.1 meters does not cost a whole action point anymore.
But the most important thing that BG3 should use to balance stronger abilities/spells would be the
COOLDOWN system divinity had. That one strike from barbar is powerful? Then allow it only once per 3 turns in combat (and not per short/long rest). But most likely this would not be "DnD"-like and therefore this super important feature is not implemented?
edit:
an since this thread is not only about combat:
I also think the lock/trap system in divinity2 is much better. In BG3 I did not need a Scoundrel yet (lvl4) to be able to unlock something, while in Divinity there are hard limitations, you can not unlock a higher lvl-lock regardless how much luck you have. And the Scoundrel can not place traps in BG3, thought this would be also a DnD mechanic?