For RtwP games, I'd like to see more Tactics systems that DAO had. Being able to customize companion behavior to that degree really helped limit the amount of in-combat micromanaging I had to to.
This type of system would require a lot of adjustment since D&D has #/rest abilities and an action+bonus action per turn instead of DAO's cooldown abilities and a single action per round, but I think it still could be done.
