This is my opinion so don't take it as fact, but there isn't anything in MM tree that BM can't do enough on it own to be worth more. Pets armor and health beats any DPS you get from Trueshot Aura. If your pets die, you die and you do 0000 DPS. It doesn't matter if your crit is 90%, if you die, you do 00000 DPS. The way you stay alive is your pets. All the BM stuff is to buff your pet. You get slight buffs also, but most mobs even elites die pretty fast even with flat hunter talents, any talents just make it faster. But, your pet pretty much only gets benefits from BM. Just my two cents.

On pets, I have 2 sets. One for pure DPS and PVP. And one for hard PVE and instances. I have 5, so you can scale it down to your needs. Easy/PVP is wolf (buff), carrion (debuff), tallstrider (debuff), hyena (debuff), wasp (debuff). Hard PVE/instances is wolf, carrion, and 3 gorillas. For PVP you have to have sprint (dash/dive). People are just too fast without it. For hard PVE, I like to have backup, even if 1-2 tanks die, I can still finish the fight. I turn all their growls on hoping they share the aggro. To me, the more you spread out the aggro, the less each has to heal.

Hope that helps. Good luck.