First i want to tell that this function is great.
Here some ideas:
1- Astral Allods
1.A- At this moment one can join with two other players with a higher gear level to get teleported to a sector we still have locked. This is gread and i would like to see if there was an option to just join and wait for at least other two players, with enough gear lvl, to join. This could be promoted by giving some kind of buff to the higher levels to stay in the party (could be something like give extra boxes from bosses, they still would spend the keys so they wouldn't get more gear or anything in the end).
2- Raids
1.A- I would like to see the option to join to the raids, that way we can make parties and have more chances to craft our gear.
2.B- If the join function was allowed, it would be nice to be able to see how many people are queued, that way people would be encouraged to join too.
3.C- It would be nice if the lower level raids were available in the group search too. Maybe not all, all the time, but just create a rotation or something, that way all players will have a better chance to complete their quests.