Instilling orb on life/mana flasks

When instilling orbs were introduced, in the interview Chris has said, that there are technical and balance issues regarding triggering life/mana flasks in certain conditions.
Particularly mod "Reused at the end of this Flask's effect" is problematic, because it's hard to track different recovery instances. If so, it can be excluded from mod pool of life/mana flasks. New mods can be introduced instead, for example "used when life/mana drops below 1%-100%" (rollable).
Looking through every other mod, I don't see any technical problems.
As for balance issues, automation can come with a cost of additional implicit like "30%-50% less recovery".
Enkindling orb enchants for life/mana flasks would be nice too.