This would be a dangerous to bad inclusion in Shudderwock Shaman. The overload will disrupt your gameplan too much, it can't be buffed by Keleseth, it puts minions on your board that you dont want to return with Grumble.... its bad guys, calm down.
Why all the comments about Shudderwock? It has been tier 3-4 for a while. This cards seems pretty bad, 3 overload is a lot.
It's still a decent deck, and sees some high level tournament play still as well. Although, I'm also surprised so many people complain about it still. I play it occasionally still, but for the most part I barely ever see it these days.