Again, that's deep water. I would have to say it's really up to the federal government to determine who is best placed to execute its mandate with respect to the protection of aquatic ecosystems, fisheries, and fish.
Clearly DFO has been challenged throughout its history as an organization. Within the wild-capture fishery there are almost dual mandates to protect wild fish and ecosystems and at the same time fisheries, the things that humans derive. They've struggled with this dual mandate for a long time.
I don't see why we need to take it away from them now on the aquaculture front. But who am I to say?