This thing is disgusting...
You can't bgh it.
You can't rag it.
It has 9 hp, so you pretty much have to kill it with hard removal.
It's stats are straight up value for 7 mana.
You can proc it yourself for a OTK.
You could have just dealt with highmane.
Well you can bgh it, you just need to run something into it first. Not the highest value you can get out of BGH but what else are you gonna BGH in hunter decks? Not likely much if anything.
For an OTK you would need to give it charge.
The 9hp does make it difficult to remove without hard removal but still very doable. That said, it is super vulnerable to hard removal since it has no deathrattle. All hard removal in the game costs 6 or less so its gonna be a tempo gain when it is dealt with. Seeing as you'll have a full turn to do so, this is quite a good but still "fair" minion for hunter to have.
If rag is gone from the meta game I won't be complaining lol.
I bet paladin does well against this type of control hunter (although I'd imagine this being used in more than just the supposed control builds people have been talking about). Equality, peacekeeper, humilty all knock that thing down a notch. After peacekeepr they can bring its attack back up but 1x2x2x2=8, so 3 procs brings it to 8 damage.
Against priest it dies to SWD or mind control.
Rogue will have sap or maybe even assassinate becomes a thing again if midrange is decent. Sap is just incredible vs slow minions like highmane and gahzrilla. Chances are it acts like a hard removal if they never get a clear opportunity to play or use it.
Did Hunter of all classes seriously just get the best card we have seen in the expansion so far?
Even if you do consider it to be the best so far, it is the only class legendary reveal we've seen so far.