I have to agree that the combat is NOT D&D, it's Divinity.
Now, that's not a bad thing. Still fun overall. Enjoying the game a lot.
But it's just NOT D&D. It doesn't FEEL like D&D. It feels like Divinity with a D&D skin.
Character balance is way off. Enemy stats are ridiculous (core stats aren't bad, but they all have massive HP bloat, which just doesn't work well with D&D still damage from abilities).
Honestly, probably the best D&D combat I've played was in Tower of Elemental Evil.
It did combat beautifully (even if the story was meh). You had everything from the 5 foot step to attacks of opportunity to a massive list of spells and abilities (all properly using official stats).
I wish that BG3 stuck more to the actual core mechanics.
