The party booking feature in RO is kind of a forgotten element right now when it has the potential to be a big help for leveling. Especially with gathering parties for Bios and NCT.
I think something needs to be done to make it more noticeable, and easier to navigate so people will experiment with it. Make it easier to describe where the party will be leveling (It'd be cool to have a way TI parties can put up an add so the leader doesn't have to sit at the entrance and recruit while everyone else gets counts).
But I think it has more potential to just be a thing for parties to put up adds, I think it can alleviate the problem with the 1fst Floor Eden problem. Make it to where there's an option to put up adds for buying/selling higher end items and things people are wanting to sell but can't at the moment because they're not on their merchant at the time (not like a shop though, just an add for one item at a time), allow it to show the item you are selling upgrades and all. You could even create a way to filter what type of item you're looking for so you don't have to wade through a sea of stuff you don't care about *cough*eden1fstfloor*cough*
Not stopping there either. I think you could even make a section for guild recruiting and everything, allowing only guild leaders and those with the punish power to set one up and allow only one at a time.
Just stuff that allows players to continue playing their game without having to sit down and afk a chat room.
For example: I only have one account I care about really, and when I have slow internet connection dual clienting makes me want to vomit, so if I need to sell something or recruit for a party I have no choice but to AFK my merchant overnight or sit there and do nothing while my party is actually doing things.