To cancel blinds is easy.
But to cancel the snare auras you have to use a nano with a recharge delay of 8 seconds on both pets.
10-15 seconds is not enough. But even a longer immunity would not solve the problem. The snare aura has an attack delay of 11 seconds and a recharge of 3 seconds. Normally, you use them well before the fight starts!
In an "ideal world" the auras should only work on your "enemies". Which automatically leads to the next question: who is your enemy?
* mobs that don't aggro you
* mobs that aggro you
* toons that are not flagged
* (flagged) toons that have attacked you recently
* (flagged) toons that attack you right now
* toons during a /duel
It is difficult to define the "enemies" and also to implement the mechanics.