The problem is the statement that each conference would have one division with 8 teams & one with 7. I would assume that the East & South divisions would be in the Eastern Conference and Midwest & Pacific in the Western. If that's the case & both Detroit & Columbus move to the Eastern, that means moving an existing Eastern team over in addtion to Winnipeg. To do that, you would have to move a team futher east than either Detroit or Columbus over. I don't see that happening.
Yeah, with Detroit and Columbus moving there would be 8 teams in each 'Eastern' conference and 7 teams in the 'West'.