ummm.. Hate to say it but your math is a little faulty.
There are 2 ways your math is faulty.
1. The Sharks had 20 points in 12 games against the Wing's divisional opponents. This works out to a 1.666PPG
The Wings had 35 points in 24 games against their own division for a 1.46PPG.
So if that pattern were to hold, the Sharks would have more points if they swapped places with the Wings and the Wings would have less.
2. The Wings gained 5 points in 31 games against the 5 weakest teams, and then gained 5 points in 51 games the rest of the time. This means that they were gaining points at a greater rate in their division, again pointing to the weaker division as the root cause.
Not that I like the results, but I'm a math and physics teacher. I just had to point out the faulty application of math...