Well said @1Varangian - but Larian ...can only do Larian, I don't think they are prepared to make the unpopular(?)/uncool choices required to improve combat.
The game is wildly successful because of it's other merits so it's unlikely they feel any kind of pressure to spend resources on creating a mode where you can't just spam the rest button endlessly. They couldn't figure that one out in 6+ years of development so maybe it will never happen.
Then again it's a D&D 5e game, asking it to play like one is only reasonable. And that would answer the need for a higher difficulty setting at the same time.
