I agree with adding a PvP room with the same restrictions as the Annihilation event, but not for the kills counting towards the PvP ladder.
"3-Have the event turned into a normal event which GMs can host any time."
I disagree with this suggestion, I think an event that requires as careful planning as this should be an event that has a set host date, so people know when to be ready by, instead of rushing to get ready for it, as not everyone is equipped enough to have spare annihilation event equips and normal pvp equips.
However, I agree with hosting it more if possible, but all of our days seem kind of filled with GvG/WoE as it is.