The answer to this really is that this commissioner's office is not intended to address things that principally affect nations that are not modern treaty nations. It's not intended to address everything. The Musqueam are not a modern treaty nation. The Cowichan are not a modern treaty nation. Those disputes about land and title and aboriginal rights, in fact, show the desirability of trying to settle things through treaties rather than litigation.
To the extent that it might affect those in the future, I would argue that anything that makes modern treaties more effective and more attractive is going to encourage nations to enter into treaties rather than having to resort to litigation to establish their rights.