Actually, I was thinking about using his shield more as a siege tool. You can push on enemies with shield's up until you close enough. And if they try to keep distance, they will lose the ground. And if things go awry you have awesome CC to fight your way out and awesome mobility ability to run, if needed.
And Spook still seems OP, can't help the feeling. It's literally better version of Dread serpent, that is affected by CC resistance as well, btw. Maybe with slow instead of dmg amplification it would seem better, idk. This would help you to keep enemies affected in attack range while still controling them. Or maybe reduce its CD and increase its range, but make it single-target ability
Anyway, he seems like an interesting concept (a bit bizarre maybe), but very hard to balace