Considering the apparent financial realities of the league, there's sure to be a % capacity number where it becomes a money losing operation to put on a game, even under a new CBA. If you cut out some mid-week games that likely often fall into that category, it doesn't seem outrageous that your profits could go up regardless of the effect on revenues.
I'm not sold on the idea that the quality of play would go up. I have read though that there are players and coaches who think fewer games would be a good idea, and they often talk about rest and injury avoidance as justification. I'm not opposed to a shorter schedule, but I think you'd want to keep it right in the 70s. I think the argument that it would cost teams money simply because there are fewer games for people to attend is too simplistic.