We can already filters servers, so why separating them? The unranked servers are completely dead because of it. Right now they wouldn't attract many players anyway, but what about after mutators are released? People wouldn't be aware of them because they wouldn't bother looking at the unranked tab and it would be harder to fill a modded server. If we could only have ranked and unranked servers on the same list, that wouldn't be a problem as almost everyone would be able to see modded servers. Mods and mutators are not going to be successful if they are to remain in the cemetary that is the unranked server list.