Fact:
Resilience was removed because even though Blizzard has a problem with PvPers getting gear that allows them to compete in raids, they have ZERO issue with raiders getting gear that allows them to dominate the PvP scene. Period. End of story. Put it in the bank.
As soon as raiders weren’t able to compete in PvP in their RAID gear, Blizzard removed resilience and then lowered the ilvl of regular PvP gear, making it harder for PvPers to compete in PvE, while insuring Raiders continue to dominate in PvP.
It’s a giant pile of hypocritical BS and one thing I hate about this game.