That's why a lot of us like the idea of ecological integrity. I buy your argument that you can't apply the Nahanni park concept to the Rouge park. No one is going to dispute that, but the issue here is that there is no definition of “ecological health”.
You've put your hat on the concept of ecological health, but there is actually no definition. If CPAWS or anybody else challenged your idea, you'd be swinging at puffballs, because the way you have clause 6 written, it's essentially good faith on the part of the minister to be nice to the ecology.