First, stop playing martyr.

Second, think about in terms of design and maintenance. The pets received no new skills in HW for the same reason we didn't receive new pets: it would add unnecessary complexity. We have a tank pet, a casting pet, and a melee pet. They all hurt the thing we're fighting (and do about 30% of your damage). What specific need do you need to have filled, and why does that ability need to go on a pet?

Third, the "damage and aesthic flavor" argument only go so far. Elemental damage is meaningless, as there are not resistances or weaknesses. You'd have 2 classes doing the same thing: AoE damage, the only difference being the casting animation. What does that add to the game?