Each game type should have its own "Sampler"
There should be one server for each general location that hosts each different game type quake live has to offer for all standard players. It should also go beyond the "sampler" in that players should be able to play the free maps for that month. This way there will always be a community of people who are dedicated to a certain game type, and will be able to play it. And because there will only be one server for each different game type, it will still give reason for people to purchase pro: because that server will fill up quickly, they can spawn it wherever they want, they can edit the settings, or they can have admin power over the server.
This way premium content won't split up the community as much as it does now. Let the free community have a bigger taste of the premium content.