Pet scaling is getting a massive overhaul at the moment. For starters, we still intend for pets to scale with all of the master’s stats for things like hit, haste and crit. For the big stats, our current plan is something like this:

Ferocity (damage) — 50% of master’s AP, 40% health, 50% armor
Tenacity (tanking) — 35% of master’s AP, 50% health, 70% armor
Cunning (utility) — 40% of master’s AP, 40% health, 60% armor

Warlock pets will be getting a similar pass. In general, we want pet dps to be 20-30% of player dps. Note that this is a lot lower than current BM and Demo lock numbers. Pet damage as BM will still be higher than Marks or Survival though, and we want BM to be competitive overall with Marks and Survival. (Ditto for locks.) (Source)