Beware this was not an average airprox. This is a frequent problem related to skydiver's dropping operations, where the skydiver's airplane typically dives to the airfield like a Stuka dive bomber, near Vne, approaching the circuit or directly the final with a higher-than-usual descent angle, often fast, hot, with a pilot under severe time pressure to the extent that radio cals are not listened to. You can repeat your own position as many times as you like, a falling rock from above won't listen to you. Extremely dangerous practices are developed by some people, just to cut a 0.1 on the engine tachometer and save $$$. I really wonder what are the rules of parachute dropping operations vs. commercial air transport. Any safety responsible person that will go to jail in case of a midair? Or it will be blamed on the pilot (as usual) and then let's move on and forget?
The report said the use of one of the Cessnas for parachutist drops had the potential to put pressure on pilots for a "quick turnaround" and called for "sufficient flexibility within the parachute dropping schedule".