I don't think there has been anything secretive about it.
In the absence of knowledge, some operational people are left scratching their heads at how this can be implemented when ATC numbers are pretty dire.
There must be an obvious reason for yet another reorganisation - must be.
One thing though - SDE is Airservices idea, NAS wasn't. That was someone elses idea, whose name escapes me. This has nothing to do wth NAS per se.
There is a more detailed explanation here (document is listed as commercial-in-confidence but is on the public website (?):
https://www.airservicesaustralia.com...epts_Jul06.pdf
There are some really neat phrases and buzzwords too!
(page 15)
Strategic Thrusts for the Airside Stream
Explore opportunities for charging for value-add services
Develop ability to provide ‘gate-to-gate’ services by developing strategic
alliances with airport owners
Develop new cost effective solutions for airport traffic control through new
approaches to provision of infrastructure and labour
Leverage the land value for airports by using alternative technologies or
equipment siting
Explore opportunities to provide business continuity services for airports with
security needs or capacity constraints
Create seamless integration of airside and airspace in order to enhance
airport efficiency
Integrate tower services further into airport operations
Can you read between the lines?
And have a look at these little beauties!:
Strategic Thrusts for the Airspace Stream
Differentiate services for customers by identifying tailored service
bundles to maximise added value
Establish the appropriate balance of access & safety between all
categories of airspace users
Ensure traffic flows are not artificially constrained by factors such as
national or facility boundaries, regulations, etc
Ensure Airservices’ internal policies and procedures allow customers
to leverage the use of their capability for maximum efficiency
Establish asystem-wide approach to air traffic management within
the region
Interesting times.