I like to go to the lobby so I can check to see where my squaddies are flying. If they're spread out, I can't type my squad a message to get us all together in one arena, without changing the radio channels in the lobby. If you do that, they all reset once you get to the arenas. It is an annoyance, I'd much prefer to communicate with my squaddies from the lobby without having to log into an arena first, or having to reset every radio channel.