Barrier Improvements for ADC's & Squishies

I had a thought while getting one shot with barrier in the preseason and I had a thought, what if the barrier shield took reduced damage by a %? I think that would give a better option to adcs who face getting blown up all game than heal if used right. Though the issue I see with it is how people might use it on tanks, primarily with unbound spellbook, but it really also doesnt seem like that big of an issue if the numbers on barrier stayed the same, its a rather tiny shield.