Well, by improving the site it looks to be that you're talking about effectively uprooting the bulk of it to another location.
The reason I don't think this is a very good idea is because our site, where it is, is really functioning quite well, and there aren't any dire needs to move it elsewhere. There can always be improvement, but this manner of things is a huge process to achieve the results we currently have right now.
You brought up the point of some moderators becoming less active (which is true, since real life has gotten to some of them, as it does all of us), but at the same time, going through all of the work to uproot this site, and move everything, everyone, disconnect the main game server from this site, and reinstalling it into another main site, and then dealing with getting users to re-make their accounts on this other sites (since accounts are processed through the site itself) would be even more work for an even larger staff team.
With our current situation, and business already working on moving and maintaining threads and boards here on this site, it would really be more work than it's worth, and would be more attention drawn away from the game itself.
Plus, with Razmirz and Red being the main ones having to deal with making a whole new forum, it would also be a very slow process, and it could even end up with the game itself being down for weeks, depending on how long it would take for Raz to move the server to another site. These guys have a lot to do in real life, as well.
While the consideration for trying to help around is commendable, I don't think this is something we truly need right now.