Hunter pets, Warlock Felguard, Warlock Voidwalker have a ‘Warrior’ class now now. They receive greater blessings you cast on warriors, and other way around.
Other warlock pets (Succubus, Imp, Felhunter) have a ‘Warlock’ class. Same kind of functionality.
It’s interesting.. and somewhat useful.. but I would have preferred to class the melee pets with rogues. Since I normally have Greater Blessing of Light on the Warrior main tank.. and I’d prefer to have Blessing of Might on the melee pets.