Jetman,
I spent 2 years of my working life trying to write Part 91 and 135 and I went to CASA with a lot of good broad operational experience. In the end I got absolutely frustrated with the processes and subsequently transferred to Darwin as an FOI. Sadly I only spent 12 months as an FOI before moving into the Oil and Gas industry.
CASA will never be able to retain experienced industry professionals in the current climate, particularly with regards to pilots.
I honestly have no idea how CASA are going to get all their inspectors trained up to manage the transition, whilst the organisation continues to manage BAU.