The resting system is something that every player can choose to interact with or not. No single player game with modding capability is robust against being broken in one form or another. Also these are 2 kinds of balance you mix up here.
I was strictly talking encounter balance with action economy. You are talking about the adventuring day balance, which is a fair point. But its also a huge problem in the pnp version, so I don't expect Larian to fix that. I expect them to not fuck up encounter balance.
