It's probably because they're just that: they are new concepts. I think my colleague referred to the fact, and concerning the regulation point too, that the thing that's unique about this process is that so much of the substance is being left to regulation.
While it's okay to do regulations after you've passed the act, we can't have any certainty about what the act really does until we know what these terms really do. I can't say with certainty that it is a rollback of environmental laws and that we are going to decrease fish habitat protection and are going to decrease the ability to protect our commercial, aboriginal, and cultural fisheries for the long term.