As a GF and not that experienced I try to stay out of other people's fight, if I see a CW, DC or TR in a big mob, I might go in and shout and grab some aggro and then just pop my shield up and sit there taking hits or pick off a witherer in Sharandar so he does not heal the big chaps.
Something did not work, we all make mistakes. They are trying to fix it as soon as possible. It's nice they've done it while the Europeans sleep for a change.