Why not switch off every week?
Though, in terms of Freespace, I think v6 is better. Making a building in the center of town looks really cool. That, and it has water for people who like to make boats.
In fact, the whole map is better, IMO.
Besides, I know this really fun game you can play with an NPC spawner, the spire of the framework building, some dumpsters, and a Tau cannon.
Either way. If I were motivated enough, I'd make a big epic freespace-type map for FaceWAN, but not only am I lazy, I'm bogged down with school and I don't know how to map for Source games yet.
I agree a change is in order, though, and Freespace is a good choice to change to. Either of them.