I definitely wouldn't say no to the idea of combat pets, combat pets are cool, but I'd rather Barbarians themselves be made much more dangerous than being given combat pets. Alternate forms of DPS, war stomp, riposte, etc.
What I would love pet-wise is something like fir familiars. Prediction's ability being moved to a wardog (dragged to another room when stunned/immobilized/etc) would be very nice and free up a precious meditation slot. It would also be cool if you could warpaint them or something to customize them with some kind of passive combat buff (increased IF from kills/hits, increase passive regen, increase voice recovery).
Outside of one specific case (Necros) I've found combat pets underwhelming, they're very high on the "cool" factor but aren't high on my wish list.
