Hi I'd suggest some changes for the guild system:
-Sub Leader
-Guild left button
-Join guild button
-Search guild button
-75 or 100 guild slots
It would be very useful to add a Sub leader for recruitment. A guild leader can be offine for a long time and none of the guild members can add new members, a Guild leader should nominate 2-3 Sub Leader in game.
-I think a person should have the possibility to left from a guild without asking or waiting the reply from the guild leader.
-Sometimes is it hard to find the guild leader online so it would be useful to have a Join guild button, so the people can join in a guild (the guild leader will see the pending requests and decide who accept or refuse).
-To search easily a guild looking the Guild List (with members number) a search button it would be useful.
-For Last some guilds are big and need more slots.