In order of importance:

-The ability to turn off guild member kicking powers for certain officers, or maybe a separate rank that can recruit but not boot. There can also be a feature that requires approval from the Guild Master for any kicks. This would prevent any griefers and reduce the perma-ban workload.

-A guild mailbox, possibly with a message read feature. It's hard to coordinate sometimes with so many members in different time zones.

-A menu shortcut to the guild hall.

-An easier way for the Guild Master to include his or her alternates into the guild. (Not a big deal, but it would help a little)

*Posted this in the guild guide, but this might be a more appropriate place

Thank you devs for your time and consideration,
Dracula