"EF is behaving properly from its tooltip. However, the PvP power conversion factor has changed. In previous patches, it was ~265. This build it's ~530, nerfed by exactly a factor of 2.
While there was a tooltip bug difference between EF and WoG (which should be identical), I think what you are seeing with the PvP Power conversion factor is that we straight out reduced the amount of healing provided by PvP Power.
It is important that PvP Power affect healing because otherwise healers wouldn't value the stat or the gear. However, unlike damage, healing is not offset by resilience, so stacking PvP Power just makes healers better and better. We knew this was a risk, but now the consensus is that healing is just much too good in PvP. We reduced the amount of healing provided by 50%. That seems like around the right number, but we may still iterate on it."
quotation of ghostcrawler in
http://us.battle.net/wow/en/forum/to...?page=239#4773
so your contribution is welcome but nevertheless a bit biased (sry if this word doesn't fit, i'm german) ... slightly prejudiced.
i hope and i'm convinced, they won't screw it up (again)^^
but back to my question, should you gem
http://mop.wowhead.com/spell=106948 or plain primary stats as usual as i cannot find any confirmation, that strength will be inferior to pvp power in rbg for dealing damage. because otherwise jewelcrafter have a huge disadvantage as there are no pvp power serpent eyes in the database ... so i would change my professions ... but please no assumptions just quotations or reasonable calculation