This would be pretty useless.

I can round up 5 other people in like 10 minutes (willing that the correct jobs are available) by just /sea all 20-30 invite

Assuming you're not dealing with complete noobs (pray that they have access to all areas) I don't see why anyone would need anything more than the information of their job, sub job, and level.

Now if you were able to /check people that were looking for party to be sure you weren't inviting any gimps, that would be something I would sign a petition for.