I really thought I had caught something special with it, will definitely keep it in my back pocket. Or until someone else stumbles on the idea.
I think DnD has strained believability for a while with the "long rest = full HP" and the fact that taking damage never changes how effective you are. It leads to a lot of problems even outside of verisimilitude, where healer classes should almost always focus on damage dealing during fights unless a character is down.