With the implementing of the new guild quests which require a percentage of the total number of members to complete, I feel that it would be beneficial if Guild Leaders and Officers of a guild could see in the guild list, the last login date for every member, or at least the number of days since they last logged in. That way any inactive members can be easily spotted and removed from the guilds as inactive accounts will now have a bigger effect on guilds now.
As there is a player / officer note on accounts in guilds already, anything about holiday dates of busy periods can be noted there so that leaders/officers are aware.