Total get what OP is saying and agree with most of it, but you're forgetting Larian's limitations. Larian is building this game on a modified engine of their previous engine.
What they probably thought was their biggest strength, has become their biggest stumbling block, and seems to changed the intention from "
adapting 5th edition rules to best suit a computer game" to "
adapting a few 5th edition rules, but just falling back on DOS mechanics if those rules are too difficult to understand/implement".
The end result is some nerfed 5E characters running around a DOS world, doing DOS things.
