If I remember right Yoshida said in an old old interview that one of the reasons we couldn't have all our skills while we were level synced is because a person with all their skills would rip hate away from a tank that didn't have all their skills.
With the way Enmity is being changed, and now that tanks get their tank stance at lvl 10, I think all tanks get that at lvl 10 now, would it be possible for us to be able to have all our skills while we are level synced?