Having one character is better for the GM because of how many players are kicking around. The biggest problem is how do you prepare groups and players so that you don't have lots of delays and active players waiting for hours between posts, compared to less active players that only toss down their one post per hour and are happy with that pace.
The solution is how parties are organized and how RJ treats each grouping. I think players should hint at their posting speeds for the day and how active they intend on being for the duration of a mission, that way players with multi-hour delays on their posts don't get joined with players who can post four times an hour.
Additionally, the "rescue" missions can be bumped into a "high priority" rating, and re-geared towards players who want to be highly active for until the mission is over. That way no one ever NEEDS to have a 2nd character since the first ones will be rescued often.
Just my opinions of course. Feel free to disregard.
