Totally not needed to have auto kick AFK on all the time. I'm on a reasonably well populated server and there are only login queues in two cases: 1) when servers go down and no one can log back in, 2) when Heavensward came out and there was a big influx of players. Auto kick AFK won't do anything for situation 1, and auto kick AFK was implemented for situation 2. It doesn't need to be on all the time. Presumably we should see it again for a bit with Stormblood and that's fine.