Ferris , The class E airspace above the Williamsport class D operates exactly as per ICAO and exactly as it was planned to operate in Australia. It is not a form of Class D.
Make up anything you like to stop change- fortunately there a lots of new ATC's and Pilots reading this site and I am sure it's why so many of you get angry when I post the US Aispace diagram.
It's so obvious that the US Airspace is scientifically allocated due to actual risk- not allocated from emotive perception and resistance to change!
And please tell us what is different about the E above Williamsport- both the non radar E and the radar covered E?
Or have I called your bluff?