FL440 - to address a couple of your observations... (1)/(2) UNICOM are only permitted to pass on the number of aircraft that are "REPORTED IN THE CCT" and the position that they reported in the circuit...how quickly is this information obsolete...how many pilots report clear of the circuit and report clear of the RWY....as this is the information that UNICOM are permitted to pass on. UNICOM place a strip when the aircraft REPORTS entering the runway for departure and remove the strip when they report clear of the circuit MBZ...if pilots don't do that then the information is invalid and not permitted to be updated by visual observation by UNICOM!!!! (3) this is NOT their job nor their responsibility nor their "duty of care". Location of AP UNICOM and its move had nothing to do with the Seneca crash, but on availability of the TWR and addressing OSH requirements.