Hello Blizzard,
I would like to see the following beasts added to the Hunter Pet army:
Cows
Armadillos
Phoenix bird (in Mt Hyjal)
As for changes:
Have hunter pets have their own Spec/class trees with points to put into respective trees.
Quiver/Ammo pouches to have their own cosmetic slot.
Melee weapon cosmetic slot (since they can be equipped).
Ranged weapon enchant/engineered cosmetic slot (for scopes).
All traps should be class wide.
Enchantments for Arrows/Ammo with visual effects.
Increase healing amounts for Exhilaration, Pet Mend, and Spirit Mend.
Increase armor amounts for tank pets (they die too quickly for solo content).
Allow Flare to light up Tar from Tar Trap.
I am sure there is a lot more that needs to be addressed. I leave that to fellow Hunters to add to the list.