Well... the ult is a 6 second 50% slow + 50% turn rate. and if they are stupid enough to face you there's an added 3 sec stun after 2 sec of looking at you which grants you 50% damage amp on them lol.

and how do you 'aim' with that lol you just pop that ult and shoot anyone whether they decide to run or stay. plus it pierces bkb.