You might want to wait until 7.0.2 patch hits. Making p2p server playable is not really about incremental addition of new players. If small groups join and look around to see no other players they will quit fast. This has been repeating way too many times already.
Many players have to come or come back at the same time to have a real chance. Usually when a big patch is released, people come back to check if anything changed. THEN is the perfect time to be there.