Nobody uses the partyfinder because there is no content for it. You are limited to bluezone group content which nobody wants to do because of low rewards and 8.3 solo players on every boss location.
Do you think, announcing server-wide that you are doing group content in a lethal zone, is a good idea?
it was always full before Queen, but yo SBI decided to add HO's, so 1 big community that used LFG/party finder for content is dead and split into slaves to big alliances, I guess that's what you all wanted lol