Larian has masked the BG3 system to be similar to Divinity in a number of ways.
Backstab being guaranteed critical for finesse weapons in DOS2 = advantage in BG3
High ground providing extra range and extra dmg in DOS2 = advantage in BG3
Abundance of haste potion, haste spore flask = subsidize BG3 limitations by giving 2 attack action (equivalent to 4 AP standard in DOS2)
Wet + Electric stun in DOS2 = same in BG3
Wet + Cold freezing water for slip/knocked down in DOS2 = same in BG3 (just re-named to Prone)
Disengage/Shove/Hide being bonus actions = subsidize BG3 limitations by essentially granting more AP per turn (4 AP standard in DOS2)
Unlimited Long Rest without penalty = spells always available before every fight and no resource management for spellcasting (DOS2)
Any class casting any scroll = DOS2
The most effective way to navigate Larian combat is still the same. Use the shared initiative to burst down 1 or 2 enemies on the first round of combat and snowball the number differential from there, bolstered by free advantage and jump/disengage cheese.
If you consider that Disengage/Shove/Hide and other things on bonus action, which should be an action, is 2 AP (the equivalent of 1 action in DOS2) and the full action each turn is also 2 AP (the equivalent of 1 action per turn), then you have 4 AP a round.
The only thing that changed is you had to add Concentration mechanic and a higher chance of missing spells due to 5e AC and DC mechanics (that Larian has attempted to minimize by lowering AC, giving low-effort advantage in abundance, and offering 0 penalty for blowing your spells each fight).
It is clear what they wanted to do with the game.
