At the moment the Login section in the Roster of the guild only focuses on Last battle. I don’t even know if that means last pvp battle or any battle. It would make more sense to have last time they logged into the game period as people may simply boot up the game for the daily gold and not play a battle. Guild masters have no way of knowing this though.
So it would be good to know if someone definitely hasn’t been on the game for several days/weeks so the guild creator can purge inactive players with the knowledge that they definitely are inactive and not just not battling.