Below is a screenshot showing my suggestion. Name of the group leader can be shown or left anonymous. This would help in many ways including the following:
- Allow more people to play casually and get picked up in 2-4 mans instead of only 1-71
- Help those who get stranded or have to leave during a full climb
- The ability to see what levels a group is at in order to join or wait for the next climb
- Know if there is a group 10 levels below your character you can wait and join when they get closer

Any and all feedback is always appreciated