The ptr has left many melee hunters in turmoil, and i suppose some things will change. However what i wanted to see most and where i felt most left out, was when shaman, warlock and mage got to play another role. Hunters have an entire tank talent tree, spells that revolve around getting hit, a tank stance in aspect of the monkey and a defensive cooldown.
Just a single rune that makes disengage a taunt, gives %threat and gives 6% crit reduction would do the trick.
Testing the new mongoose rune feels incredibly good when you are tanking just a single mob.
Having the possibilty of taunting with the pet and perhaps using a turtle pet for the first time ever in classic would be interesting.