Battlecry Loatheb often turns what would've been a good tempo turn into hero power + pass, or maybe hero power + Eternium Rover. Loatheb had some "bad" match-ups where it didn't hit anything and was still in every deck. This new card hits every single current meta deck except rez priest. It even hits itself, so the best way to stop this from wrecking you is to play it first. This might be the best card we've seen so far.
Some of these adventure cards, including these leaked ones (assuming they are real), seem like leftovers from the main set or were cut for some reason. Some are really powerful and some are why is this even a card?
Well, in the least the meta should be changing with a few of these cards.