The thing that kept me from trying Thane with Bladestorm is that the ability to interrupt or stun while channeling Bladestorm is limited to the Slayer tree specifically. That is a problem in keys where interrupts are important.
That limits me to Slayer specifically because I love Bladestorm and hate ground target damage abilities (Ravager and Spear). I would be curious about Thane if I could interrupt and stun while channeling Bladestorm baseline.