With all those changes listed, you are basically saying that if it was a different plane, the software would not be a problem (which in turn is an issue because

With all those changes listed, you are basically saying that if it was a different plane, the software would not be a problem (which in turn is an issue because we don’t really know that would be true or not since Boeing seems to have institutional problems). The issue is that the plane was changed only enough to avoid a cert issue but to keep the plane flyable, software had to be implemented to keep the pilots and the plane in check. So, the plane needs to be either redesigned or it won’t certify. You are correct in that Canada called Boeing’s bluff. But the software is the issue or the plane would not be flying anyways because it wouldn’t certify.