My point is that some mechanics are essential to the challenge, and they add a dynamic twist to otherwise semi-stale turn-based combat.
Ironic that you argue for faithful 5E implementation while taking a swipe a turn based combat. You can't have faithful 5e combat without it being turn based. As you haven't played BG3 yet you don't know what has changed nor whether or not those changes improve the game, so I'm not really sure what your point is.
