Questions on Pet Stances

Will the new-fangled "Aggressive pet stance" cause my pet to do less dps if the mobs are small and they die quickly?

In "Defensive pet stance," will I still be able to have my pet manually attack enemies who may not be attacking me [yet]?

• The Aggressive pet stance has been removed and replaced with the Assist stance. This stance will cause the player's pet to attack the player's target. The pet will not change targets unless the master attacks a new target for a few seconds.
• The Defensive pet stance will now only cause the player's pet to attack enemies which attack the pet or the master.

I suspect the answer is "yes" in both cases.