The Rouleau Commission is a very good example. A huge number of documents protected under cabinet privilege were handed to the commission, because they alone could explain what happened and the decisions that had to be made quickly. In the end, the sky didn't fall and people got a lot of information.
It's not my place to tell you that information should be released, but someone in an independent commissioner's position like mine should at least be able to check the information to make sure that it truly falls under cabinet privilege and it isn't just a standard document providing advice or recommendations.