This thread comes around every month or so.
The answer is this: Ssg will not touch pets and hirelings unless they can do a full thorough overhaul, which they desperately need. They don't bother to fix any smaller things.
Yet for a big pet/hireling overhaul they need to invest time/money and have a way to earn that back. And pets/hirelings are NOT new sellable content.
What i am hoping for is a new summoner archetype. That would give them a good reason to do the overhaul.