I can only speak for myself but to be honest... the only way they could make healing engaging in this game, is to have a revamp of how damage works. For a game that exposes the player to so many fantastical settings and encounters, damage is painfully binary and boring. Your number is either low or high. That's it. Perhaps having different types of damage that require different actions? This would likely require a complete re-structuring from the ground up.

Idk... Complicate things a little bit. That's where my engagement comes from.