I would say yes, all of those things should be done. I guess the problem is that doing those things won't necessarily make the system work. If the roles and resources of the Integrity Commissioner aren't clear, if the mandatory reporting of disclosures to the agencies is not clear, if you don't have clear responsibilities on the agencies to implement good whistle-blowing systems, and if the Integrity Commissioner or another agency isn't actually enforcing that or making sure it is occurring, then you still won't have an overall system that works.
I would say yes, those things should definitely happen. It may be that the committee can recommend two tranches of amendment, one being the things that should be done right now and the other a broader review to make those larger, systemic changes that will actually ensure there is a workable system.
My lack of familiarity with your system limits my ability to give you too much more advice on that.