What your example does is display that buzzard and hyena are slightly OP and that hunter is based on synergy. (you know, the class that has nothing else going for it but synergy)
UTH on its own is a shitty arcane explosion which can be distributed manually, BUT is stopped by taunts, can't target stealthed enemies, will trigger secrets and will trigger enrage and effects of frothing berserker, ghoul, acolyte and gurubashi
repeatedly.
I think that is a whole lot of drawbacks for just being able to distribute the damage, the fact that it leaves board presence if not destroyed is just fair.
Sure it is better with extra cards, but
that is the point of the entire class.
Other classes have many more ways to draw cards and in ways that don't rely on the opponent flooding the board.
Sure it is only one mana more, my point is that Blizzard once again gives in to pressure of whiners without actually looking at any data or figuring a creative way to balance things out.
Not surprising, as that has been the trend in WoW for years.
UTH gives depth to the game by forcing the opponent to
actually think while playing. I have seen many games where hunters were forced to do 2 damage uth for a measly 2 card draw, but yeah those games were played by good players not crybabies.