Too much passive combat
Your example just turns a single-target attack into a multi-target shot. How does that require skill? The only thing that comes close is positioning to hit multiple targets. There’s already plenty of that in the game. I’m not arguing against more active play, but your example doesn’t make it as a poster child for your suggestion. A trait that gives bow shots extra damage if the attacker is above the target might be a better example — though I’m sure someone will disagree.