Agree, the frost-like arrow is so similar to hook. Two principles:
a) takes good aiming for the stun to take effect
b) make sure no creeps in between, enemies can easily dodge by hiding behind them
As for leaping being like blinking, well, that's not true. You gain speed aura after you leap, so how can that be like blinking. IMHO it's more like "in your face" leaping, chasing the enemy from behind, gaining strength as you go along, hit hit hit, dies. Goes the same for escape. So what if you can blink (either with a skill like QoP or Magina, or with dagger), there isn't any speed boost to help you get away. Not like the Leap skill anyway

Beware though, this skill can make you feel overly confident. Don't accidentally leap into the fountain like I did.