There are plenty existing demon models that can be used.
I don't mind if we get a few more model options for pets who cares that they have the same role. :S
Its not like hunters have all unique pets, they have only three types of pets as well.
felguard and doomguard being a guardian type..sounds interesting would'ent mind seeing a fel guard attacking a target followed by a doomguard..lol come on blizzard give us locks some new pet toys..lol