You are wasting your time. The Senate is a bad joke. Nothing will be done to curb CASA's power, in fact it will actually be increased as a result of the review.
This will occur because the Senate and the Minister will accept CASA's submission that the current unhappiness with it is due to its lack of resources, lack of regulatory powers and most importantly, the number of regulatory constraints imposed by Government on its functions - for example the requirement to be a model litigant and also its subservience to the Administrative Appeals Tribunal.
"If you will just unchain us and free us from these fetters, Minister, we can do a much better job!" - along with the not so subtle message that if there is a major accident CASA will point to its lack of powers, as evidenced by its submissions, and blame the Minister for the accident.
...and then the bastardry and embuggerance will continue to new heights. So my message is: BOHICA!