The “named” preset server configs have the advantage that you as a player know before hand what you are getting into. I think they either need to create more of these named configs, based on the most popular custom options out there. Hopefully reducing custom servers since server admin could pick these instead.
The server browser is not completely horrible, but I think there should be away to preview the server before joining. The preview would take you to another page before joining. The page could have a lot more options exposed and the player list. The trigger could be the right mouse button or Add a little preview button?
Alternatively (or even additionally) they could give us an advanced filters options, where we can find the filters for pretty much everything else.