In the past years, if you wanted to play a RPG, you had to choose between a game with good production value but shallow depth or the contrary. The true game changing argument this game has is that it simply has both.
No, BG3 *is* the poster-child for high production value but shallow depth. Diluted 5e mechanics are as shallow as one can possibly get. The only next step below is no mechanics at all.
Oh, and D:OS mechanics are no better. Just load up on a couple of key ranged abilities on every single party member and then pew pew pew. That's the game.