Full Party

EA, please tell me why the "join game" option has disappeared from the game... so I cannot join friends who have full parties anymore. Before I could, it would either put me on the enemy team or on the friendly... it didn't matter, cause it made it more fun and was in every other battlefield game before.... i'm hearing it's because of server instability or something... but it's been MONTHS, and because of that i literally stopped playing the game. PLEASE tell me if "join game" is coming back or if EA decided it's not needed.