You can't certainly answer those questions because there's no way to know. The signs might point to it, but it's uncertain whether we'd be better with McRoberts this season. I'm not saying this team is better because he's gone, because there's also no way of knowing that. It's just something people can discuss and disagree on, but can't really prove either way. All speculation, which is part of what makes it fun to talk about.
Ok, not with certainty, but the signs certainly point to the team being as good if not a better passing and defensive team with McBob