1. Guild invites should be able to be sent to players even if the player is offline.

2. People should be able to request entrance to a guild in a way similar to friend requests.

By adding a /guildrequest command, a player could ask for entrance to a guild without needing to find an online member of the guild.

If the command were written as /guildrequest <guild name> <note>, someone could leave a small note, provided that there's room left in the chat bar, such as "Astro's friend" to give significance to the request. Guilds could require applicants to include their level, dps, build, etc. in the note section.

Only the guild master would be able to see the guild requests, and there's plenty of room on the guild member page to insert a [Requests] button.

3. There should be /goto shortcut commands for those who don't wish to use the map. Commands could include:
/goto town1 (windmoore)
/goto town2 (travelers outpost)
/goto town3 (City of Kraag)
/goto guild (The main guild castle outside of the actual guild hall)

If this were utilized correctly, you could access every room through commands, completely eliminating the need to use the mouse, not to mention it's a lot easier to tell a newbie to "type /goto tavern1 in chat" rather than explain to go to windmoor, look for the shiny doorway and go there to find the first bard quests. Granted, this is just a shortcut, but it would help.