We have already done some closed testing with a very small group of players. Our first test have been focused on getting stable/solid multiplayer connections. We have luckly been able to work with a group of players that are located all over the world and the test results have been promising!
We have to balance the cost of running a multiplayer game (servers are expensive) against the quality of the multiplayer connections (poor/laggy connections and no one will want to play the game).