If D&D was a Naval Wargame, used the same combat system, and Class represented type of ship.....What would you think of these Healing Surges?
Bilge pumps of course. The ship is sinking but the crew pumps the water out and/or does emergency repairs.
But this thread is about how to replace healing surges with more "narrative" friendly options. You want the thread "should 5e have healing surges" next door.