He's too dependent on his team to be useful.
Q far too weak and ineffective to be his only damage skill. Even if you stun it starts off at something like 1 second. The range is short and too easy to hit minions
W I don't really have a problem with, except that it starts too weak for cost
E is only useful in very specific situations, and once a team starts seeing you use E to back and get them they will hide in a good spot every time they recall making your E mostly useless. not a bad ability but I feel it should do something more like damage or slow enemies that use it
R - great skill in theory and in VERY specific situations, but 9/10 times the enemy will be too close to your allies and you'll get end up using R on the wrong targets and is just as likely to hurt your team as it is to help them. I think this could be fixed by adding a little range. It already has such a high chance to be wasted or harmful to your team the least it could have is decent range.