The patch notes look very good for hunter pet tanking. They are patch notes so we won't get them all, but they look nice all the same.
Call the pet you need for each encounter you face:
Call Stabled Pet: Cooldown reduced from 30 minutes to 5 minutes.
Don't stack as much Resilience just to have an un-critable pet:
Pet Resilience: All player pets now get 100% of their master’s resilience.
Avoid 90% of AoE instead of just 75%:
Avoidance: This talent has been replaced by Culling the Herd. Hunter pets now innately take 90% less damage from area-of-effect abilities like all other class pets. This does not apply to area-of-effect damage caused by other players.
Cowardice tanking! Take less damage a fair amount of the time:
Cower: Redesigned. This ability no longer affects threat, and instead reduces damage taken by the pet by 40% for 6 seconds with a 45-second cooldown. While cowering, the pet’s movement speed is 50% of normal speed. Cower now only has a single rank and is available at pet level 20.
Don't suffer the [new] movement penalty while cowering:
Improved Cower: Redesigned. This ability now reduces the movement penalty of Cower by 50%/100%.
More damage, more threat:
Culling the Herd: This pet talent has replaced the Avoidance talent in the pet trees (Hunter pets now gain that benefit automatically without expenditure of talent points). Culling the Herd increases pet and hunter damage by 1/2/3% for 10 seconds each time the pet deals a critical strike with Claw, Bite, or Smack.