The problem with a server restart to kick AFK players is this... Server Max is 5000 (Stable server limit, as stated in interview) - Say even 500-1000 are AFK and you have 4000 Players who aren't idle. You then would have 4000 people trying to log in at the same time. You would kill the Lobby server and thus create a whole new issue that already does arise from time to time without such things slamming it.

So while kicking AFK people may be a great idea, server restart in this condition right now would merely cause more problems and crash the server with mass log in from the players who aren't AFK.