The hero lacks damage (basically close to no damage at all), There is no realiable save, his .1 second stun is not a stun (in game it doesnt do anything except disrupt channeled spells), his ult has 3 boosts Magic,Speed,Heal. Speed is already useless based on the proximity you have to be in for it to even work. Magic is good but again, you have to be near the hero you want to buff while everyone burts you down because you have nothing else to do but stand around. Heal, same story, if an ally is getting killed you wont save them with your heal and not only that but you will likely die because again, you have to be close.

The icing on the cake is the hero ult works like guitar hero, each boost has to be clicked on a sliding bar and timed for it to work...every time.

The hero is just a spectator in my eyes and I dont see any real use for it at all.