I thank you for you question.
You are right in saying that there were some concerns when the office of the inspector general was closed, that it could have an impact. Well, it's the opposite that took place. For this I would refer you to the last annual report from SIRC, which clearly says:
As required under the CSIS act, SIRC's interaction with the Minister have become more frequent. Far from compromising its independence...this relationship has substantially added to [the security and intelligence review committee's] role in the system of accountability and has, if anything, deepened SIRC's ability to reassure Parliament and Canadians regarding the activities of the Service.
This action was taken two years ago, and we can now say who has benefited: the whole Canadian society and the protection of their rights and their freedoms.
Let me just add that it's not only SIRC that can review all CSIS activities, but it is also possible by the Auditor General and the Privacy Commissioner.