Bots in general are just a horrible concept. It completely destroys the thought of strategy. Instead of appoint someone to be the healer, everyone can go medic and whip out an auto-heal. Healing should be a touch-action that has a 2 second cooldown and heals based on a %, as well as status effects. It should also take into account if you're in combat or not (Less health healed if damaged within X seconds)