New spell suggestion;
Pack Master
Level 69 Beast Mastery hunter ability
Passive
You are master of the pack, allowing you to control 2 non-exotic pets at one time, but reducing both pets damage to 60% each while both are active. Both pets can only attack the same target. If you have only one pet active, your pet damage is increased by 120%.
This spell is the based on the idea of people, including myself, who wish to see BM as the duo-pet spec, and at the same time not penalizing people who want only one pet out as opposed to MM and Surv that can choose talents to be powerful without their pets. The restriction that only two non-exotic pets can be active at one time is to make up the fact it would be too powerful to have 2 exotic pets with 6 different spell at the same time.
With the lost of 'Aspects' toolbar, I think 2 bars for pet can be implemented, and the second bar would only place the second pet's family spell and or with other spells specific to the pet's talent such as Thunderstomp if the second pet is a tenacity pet. However, the we do not really need a secondary pet bar, as the secondary pet would only attack the primary pet's target, and it would follow the same stance, guard point or follow command of the first pet. The secondary pet's family skills too can be controlled by AI's auto cast, so Hunters wouldnt have to worry micro managing another pet, as the same control bar, controls both pets.
I would also like to suggest besides choosing Tenacity, Ferocity or Cunning specs, all non exotic pets come with 2 spells which can be switched around. For example, if you tame a cat, you can either choose 'Roar of Courage' or 'Rake''; Mortal Strike. The choices would be usually between a utility(turtle shell, fox's avoidance)/pvp(movement reduction/mortal strike) or buffs/debuffs to make all pet family useful in almost any circumstances.
Just like pet talent's, the secondary spell can only be switched with the primary spell to be activated while out of combat and not in bgs or Arena. I will post more on suggestion of choices of what other secondary spell that each non exotic pets can learn later.