Given what we've observed, as you saw in the photo I showed you earlier, it's obvious that everything done so far is not cutting it in terms of fixing the problem.
According to the scientific literature, a low water level means little erosion, and a high water level means more erosion. It goes without saying.
It only makes sense since we know that the five reservoirs on the islands of Sorel were set up by the federal government. The scientific literature tells us that the reservoirs cause the water level to be higher. The only thing the experts don't agree on is how much those reservoirs caused the water level of the river to rise.
The short answer to your question is that I'm not an expert, but one thing is for sure. In light of what we're seeing when it comes to the eroding shoreline, something needs to be done now.
I don't think the current voluntary measures, as you mentioned, are producing the desired results. We can't say everything is fine now. It's not.