If there is to be an afk kick then give it a reasonable amount of time for being afk, like 30 mins. If a person is afk for that long then they're obviously not playing, but if they need to read something to find out what to do next or need to make a quick bio break then they have ample time to do that without fear of being kicked out of the game.

Oh yes, and give us a log in queue too please. This refresh every 5 mins thing is unacceptable.