IMHO we should not seperate the servers into 2 categories, otherwhise we end up like IW4x where noone plays on the party servers.
This was only really the case as party servers on iw4x were not stable at all and had issues & it's not separating it's just a type of server similar to how different servers have different game modes, they will be shown in the same server list. If it was a choice of only having one server type then it would be the current implementation on pluto, I suggested this only an extra option/feature. As Mr. Incredible said i'd treat it as a nice to have feature.