I hear you with injures, and big holes on the roster, etc. And I do think the 67s will improve from this past few weeks.
However, your calculations seem to only imply that the 67s can get better. You discount for instance how many points the Fronts also lost (when stating the 67s were in 1st) due to injuries, poor coaching at the start of the year, learning a new system, and also having holes that are now being plugged.
With a healthy, well coached Fronts team with new additions, it would be hard for me to see the 67s being any better than the Fronts, especially several seeds better, even healthy and with two more bodies via trade.