I kinda figured they would put one -must have- legendary into each mini-set to drive sales. Not so much. In fact, I wonder why they don't? Seems like it would be a smart idea.
But, I see nothing I really need for the decks I play. I wouldn't mind a couple of the Priest cards, but I can just craft them if needed.
I do think if you like Murlocs this is money well spent though. Just not my kind of playstyle. Seems like it will be very strong tho.