First watch the opening movie and catch yourself saying why can't we have that?!

The concept of Guildleve was promising but never worked out like it should have. Like most concepts birthed in FFXI it got lost in translation.

1) Make the Adventure Guild the meeting hub for adventures instead of camps. Move the Aetheryte Crystal to the Adventure Guild. Expand it to house a multitude of players. This where the adventure begins.

2) The guildleve should be targeted between 1-4 players. Maybe sign up at a desk (queue system) and select the role you want to play (tank, healer, dd). Once the Party is made the leader heads to the counter and picks the guildleve. Then it's a simple teleport to camp and get started

3) Random quest generated during leve. On a rare occasion while doing a leve you are placed into a cutscene that gives you a quest to complete instead of the standard leve your signed up for. That way the system is fresh and won't get dull and repeative.

4) More categories instead of kill X mob. Really look at FFXI Assault system for unique ideas of guildleve.