Well they are running Monday Night  Madness in there with even plane sets. As the MNM has a decent following we will see if 2 sides work as the numbers climb.
Personally,  I think as a furballing  setup 2 sides is ok, but when it comes to a sandbox war type play 3 is better. Sure you get one side singled out, but if it is only 2 sides your either the hammer or the nail. With 3 side there are more options IF you choose to use them.