Guildleves are used for getting rarer items which negates the need to farm a mat for a piece of popular gear. Also, guildleves are popular to earn guild marks which advance your class. Therefore, please don't try to eliminate a perfectly fine system just to get rid of it. It has it's uses and solo players still enjoy doing them.

If you don't like doing them that's fine. Please however, refrain from talking for the rest of us that enjoy doing them.