I think additional buttons is fine. Less is more as they say, and there’s no need to overcomplicate it.
There is already this suggestion- Private/Passworded Dedicated Condos which could eliminate those Friends Only condos off the All list.
All could be kept as it is, Favorites too.
A Friends Only tab could include both Player Hosted and Dedicated.
A Player Hosted tab and Dedicated tab would do wonders.
And finally, a Workshop tab.
There’s no need to dress it up, just the same lists as they are with specific filters applied.