It would make zero sense from a development standpoint for Larian to spend the time and resources necessary to design the combat around DOS-type mechanics, with the intention of going back and moving more towards 5E and negating the work that has been put in to the project.
Not to mention, that every statement from Larian, has indicated that including DOS-style gameplay, was intentional, because they don't actually understand 5E rules very well, and have struggled to adapt them.
I'm annoyed as well that we haven't seen any major changes other than improved dice rolls. But it is still logical that Larian wanted to get as much done to get the game into early access and the hold off onto other aspects for later. So there are some Divinity hold-overs.
I don't know why RNG was the main focus, when disadvantage while attacking enemies on a higher elevation than you can confuse the player and result in a miss. (Note, this is not RNG's fault but a poor design choice).
That being said, where's a hotfix for rule implementation? If we can get a hotfix for different RNG, why not one to address backstab? etc.