Taric Q (Heal) health spillover buff?

I was thinking assuming it's not already in place, to make Taric a little stronger, they could change it so that if Taric's health is full, or almost, his ally is healed more based on how much Taric did not need to heal himself.

Perhaps if it's too strong at a 100% conversion rate, making it 75%/50%/25% bonus based on level, or a flat % Lvl. 1-18?

That way if my ally is only slightly injured, but me heavily, I don't feel bad spending the mana to heal their little bit of damage, and this means I'm more likely to rush Q at early levels, instead of considering anything higher than Q Lvl. 2 or 3 to be a threat to my mana supply.

At this point rushing E or W is more helpful early at times after stopping at Lvl. 2 or 3 Heal, because of how mana hungry it is.

I think this health spillover mechanic would make the Q more worthwhile to cast in various situations, and feel less like a mana hog.

Topping up with my heal is no longer much of an issue if one player is heavily injured and another is not hurt much at all.