Sneeds is not bad, but he is neither very good. I would only craft him, if I got too much dust, or got all the other basic legendaries (where Tirion is definitely one of them [except you never, never, never play Paladin])
I got lucky and pulled Sneed's from a pack, but if I hadn't then he would have been in line behind a fair number of other Legendaries to be crafted, down in the "never gonna get this far" portion of the list. On the other hand, I just DID craft a Tirion. He was the 2nd Legendary I ever crafted after Dr. Boom which gives you some sense of priority ;)
My general policy is that I wait to pack class legendaries and only craft legendary neautrals. You will be able to use Sneed's in multiple decks which gives it more value in the sense of adding it to your collection.