Me not being a WvWer myself, I ever-so-often like to look at the standings, and here about what’s going on.
From what I heard people are using the Free world transfer in order to join #1 servers or join huge zergs together and create an ultimate zerg team.
My suggestion is to make a time period after you switch where you cannot enter WvW This prevents people from simply switching to whatever WvW team they want every 24 hours creating massive teams.
Discuss said suggestion above/Anything else about WvW Gossip:)