Can we talk about Quinn's vault for a sec?

Why doesn't she always bounce off people that are dashing or interrupt queued up abilities? It's a vault. She's jumping at them, kicking them in the face and leaping back. It seems counterintuitive when you're in the middle of kiting but have to dash closer for a moment and allow the enemy to get a free hit on you. She shouldn't have to use it for kiting only when people are already in melee range. These days, if something is in melee range, you're usually already dead. Been playing her lately and that part of her kit really bugs me.