NFL

The NFL did a schedule retooling in either 2009 or 2010 to make sure The teams played division opponents in like the last three of five weeks.

Absolutely massive benefit, and the primary driver was to prevent teams from winning the division in like week 14 and then sitting your starters for the next two or three games.

Certainly seeing an uptick of situations where teams might play each other twice in a month, but as long as divisional games end up being in the final portion of a team's schedule then I think the system is still working appropriately.