That's what the booking system is for.
You can't put up comments in a booking system, can you? So I can't put up a msg saying something like "N>warlock, gwing thor" or "Need 2ABs, 1 aoe" or "R>X [2spots] gwing"
I don't even pay attention to the booking system, its too limited. Much easier to just go in eden, get the quest, put up chat asking for party/recruiting, then use the guy to warp. All in one convenient place. That is the location where people get the quest, so it makes sense to form parties there also since that is where you find people doing the quest.
I don't know what the issue with chats/vends is, I've never had a problem clicking the npc.
If chats get disabled then I'm just going to sit in Eden and spam my needs. When multiple people are doing that it is going to get annoying fast.
Isn't that why people hangout on floor 1 of eden anyway? Quests and badges.