I am curious to see what the new warlock talent trees will look like, and what changes (if any) may be coming to warlock pet customization. There was a Blizzard post on hunter pet philosophy today, and at the very end they mentioned other pet classes:
We realize pets are an important piece of your identity as a Hunter, Warlock, and Death Knight (and Mages too?). There are ongoing efforts to improve pets, add new pets, and make cool things for pets and pet classes.
This gives me some hope for stables or at least other ways that could improve warlock pet customization.