Manually Adjust Hit Dice available?

would love to this fixed, i have homebrew weapons that consume hit dice.

The recent book of Eberron and Forgotten Realms also introduces many usage for hit dices outside of resting. (Weapons of Hunger and Spellfire Adept is what comes to mind first)

It has been years. I now have a player who has the Healer feat and needs the party to be able to do this to use the ability of that feat afforded to the Healing Kit. This was all WOTC stuff published more than a year ago now. How hard can this seriously be to implement and how asleep at the wheel is this team? 

This is being addressed through the Game Engine Rebuild.  Pre-WOTC the implementation didn't allow it, and it's too spaghetti code to retrofit it, so they're rebuilding the entire engine.  And have mentioned that consuming hit dice with features is one of the aspects they'll fix.