Sorry but is this a try to nerf archery? (not archer myself) cuz if u want to be realist, it should not affect the projectil before a really long distance and hitting somebody at such a distance is already rare to see. Either a luck shot or somebody standing still. Only really good archers like loki has managed to snipe me even while moving... So i dont see why this should be implemented...
At same time, why not make it so that guys in plate cant jump much and whenever they fall, they get crushed under the weight of their armor (get more falling damage)...