With the new ATC regions coming to IF which will lead to new opportunities to fly to unique airports, top down center would be a perfect addition.
But, what is top down center? On VATSIM, center controls all airspace from center all the way down to ground if that airport specifically is not open. This would be a great addition to IF to allow less busy airports without an active controller to also receive basic ATC services. ATC could also have the option to specify certain airports they will cover and certain airports they will not cover or opt out of providing it completely if they are overloaded or busy.