So, I hit 80 like 2 - 3 weeks ago and have suffered the horrors of going from 0 - 600 or so resilience against geared players. Then again, I've also fought similarly geared people during that time...

Everything changes as you get resilience. A fight between a mage vs a warlock (randomly picked warlock, don' make a deal of it) who both have 100 resilience may give the advantage to the mage... but when they both have 400 resilience, the fight can shift in the warlocks favor. By 600 resilience, it may be back to mage having the advantage... etc.

Anyway, it has always seemed silly to me not to just have a flat 100% resilience bonus to pets due to how weird scaling is with resilience compared to other stats. With the pvp changes, it might be worth talking about.