I also believe that besides some people that want a faithful 5e implementation just for the sake of the game being FR/D&D/BG3, there are (or WILL be) many people like me who realize that after 20+ hours of playing, the combat just really blows and that making it more like 5e and less than DOS might be one feasible way to improve it.
Larian actually built some really slick systems in DOS – all the buffing/debuffing, countering elements etc. Hugely strategic and perfect for a turn-based game. Unfortunately D&D is a lot more convoluted, I can see why it would take them some time to transition across. Heck, D&D Beyond only just added advantage/disadvantage on skills after several years and they’re only building a character sheet. There are a LOT of systems that need to interplay correctly and many, many exceptions and edge cases. I’m going to remain optimistic that they just need more time.