I think at the moment that we (bristol) need to re think the entire server and session hosting idea. The server itself works for most people, however it does not encouarage new members to actually go onto it...
If I was a normal Gamespy User, that had never heard of bristol before, and went onto an open session, and joined on the website, I'd be very surprised and disappointed to find out that you have to join this server to get onto sessions. I would therefore probably not go on as I would think it not worth the hassle. For you, as a member, you know what bristol is like and so you would make the effort to join any session however you could. But the server is not advertising bristol well, and it doesn't seem to draw in members like maybe Gamespy did.
Another major flaw that I've noticed, is that there appears to be no major information for new pilots in the how to join us section that states clearly that all our secure sessions are on a server.
OK. So at the moment levels of people on the server are quite low. Already the PEF has been scrapped, which is a good move, but maybe, just maybe, people should consider reverting to Gamespy. Purely because it has the largest member base...