So less arbitrary than playing the game...is to not take the results of games, but judge by how many total yards they gained or gave up?
Again, you're picking apart particulars that haven't been decided. We're not at the point where we need to discuss details, but instead, broad, "big picture" ideas are what's needed. Sure, we can adjust the formula to include W/L. So now that satisfies your concerns. Great!
The point is whether or not a different scenario would better select the best teams, and how that scenario would work
in general, not to dissect the minutiae that aren't relevant to the discussion.