I agree with Ross on all counts. Desperately needs more health, he died instantaneously while charging into Carn Dum Swordsmen (not pikes), not fitting for a tank.
Well to be fair Carn Dum pikes are a bit different given that trampling them basically does you more harm than any other pikemen, since not only do you take the counter trample damage of running into pikes, but you then take a large portion of your trample damage on top of it due to their passive. But even so, I agree with what has been said.
His health does need to be changed to be in line with other tanks, and I think his Level 7 should be changed so that it only blocks abilities, however to make it a bit fairer compared to similar abilities (Thranduil's 10 hit negation), perhaps it could be changed to block 2 abilities per minute, as opposed to 1 hit per 30 seconds (I understand this is more or less the same thing, however this allows him to act as an anti to hero killers in a shorter time frame, who tend to have two or more abilities to assist them against heroes).