I agree with Dahbomb that barnes is gross in Hunter. It's not quite as swingy as some of the huge bombs from other classes, but it's VERY relevant that you're almost always pulling a beast with deathrattle and he's consistently pulling something above average. His powerlevel is much more annoying based on if the opponent can ping or not with a hero power, and even if they can they usually fall behind if they feel forced to spend mana to deal with the token beast you pulled.
But there's other stuff like I'm seeing anyfin pally run it to potentially pull tirion, another murloc warleader, rag lightlord, acoloyte of pain for cycle, etc. But it can also get an aldor or azure drake which aren't doing much.
The difference between these are massive, game deciding outcomes based on a prayer, early in the game which is when this is most impactful.
But there's other stuff like I'm seeing anyfin pally run it to potentially pull tirion, another murloc warleader, rag lightlord, acoloyte of pain for cycle, etc. But it can also get an aldor or azure drake which aren't doing much.
The difference between these are massive, game deciding outcomes based on a prayer, early in the game which is when this is most impactful.