Hi I've often thought that having a new tab in the option menu box would be of great benefit.
The Tab I suggest to have sits between the characture Tab and the Exit tab. Make this tab a server select tab so we don't have to keep logging off all the time when we want to access toons on a different server on the same account.
Eg. I have 5 toons on Teos and 5 on lailah it would be nice to know I could just select the tab and go from one to the other without the need to keep relogging.
The other suggestion I think would be of great benefit to make life easier is to have a search box at the guild master so you don't have to painfully scroll through each guild to find the one you are looking for. As you type the name of the guild you want, it starts to filter the guild selections down as you type, showing only guilds of that name or similar.
Cheers I hope these are good suggestion that you will consider.