I can tell you that it is not actually reduced by 60% of PVE damage in full s12. Essentially the % increased pvp damage from PVP Power makes it so that 57.8% resil is less than stated. Theres a graph and explanation here

http://www.mmo-champion.com/threads/...silience-Guide

Because of the linear scaling of PVP Power you can essentially increase your damage more than it is reduced. As you can see if you can manage to get 56.7% of your PVE damage vs someone in full s12 gear not completely gemmed for pvp power, and a warrior can effectively get 66.8% normal damage with t2 + full pvp power gems etc.

PVP power scales linearly where as resil has diminishing returns.