I agree - and virtually all of the GL states/provinces are working on it. To date, returns and survival has been dismal. Too many dams, too much warm water, and too many bad "exotic" species.
I think it's an impossible task today, but I'm glad they're working on it. Some good research is appearing, and HOPEFULLY some good news, especially for the Atlantic Salmon. Only time will tell - Rome wasn't built in a day, and trying to minimize the effects of the last 250-300 years is tough.
In the meantime, steelies and browns ain't bad, for a diversion!