While this sounds good, and will give folks the warm and fuzzies, i don't se it as really helping or changing anything.

As I read it, we are not going to develop NEW fisheries on species not currently exploited. How will this support an ecosystem already being over-exploited?

Take the Killer Whales, which are currently in nutritional distress. This changes nothing for them.

If we want to help the whole foodchain we need to leave the lower levels alone. Or, we have to accept significantly smaller than historic levels of the predators we want to eat or watch.