Here’s the reveal thread from this forum. Not terribly long, but shows some of the initial reaction.
A few posters thought he’d be OK, or at least situational, but most thought he’d be bad or unplayable:
It’s probably good to remember that he was revealed in the tail part of the Stormwind meta, when the majority of complaints were about Pirate Warrior or Quest rewards and combos ending the game before any slower strategy could go off.