I'm actually surprised, that so many of you want just a DOS3 instead of a BG3.
because that is exactly what OP is describing.
BG1 and 2 both used the dnd rule set from their time. At least they tried to adapt it as good as possible for their time.
the DND5e system is fine, even without a generous DM. there is no problem to use that system as basis for a computer game. look at pathfinder kingmaker. they took a much more complicated rule system and implemented it pretty faithfully and people love it.
yet here we are complaining, that BG3 would be boring if it was faithful to 5e rules. i really don't get it.

We are at a point, were one group wants a DOS3 and the other wants a BG3.
I don't want to be rude, but what about we wait for a DOS3 until BG3 is finished. because i think it would be great to see some thing new from larian, instead of an improvement from their other games.