In 1977, Dallas won the NFC East. They played 8 games within the division, 4 games against other NFC opponents and 2 games against AFC foes. That makes 57.1% of their games were against division opponents, which is significant. That is twice as many games within the division than against other NFC teams.
In 1992, Dallas won the NFC East. They played 8 games within the division, 4 games against other NFC opponents and 4 games against AFC foes. That makes 50.0% of their games were against division opponents. That is twice as many games within the division than against other NFC teams.
In 2021, Dallas won the NFC East. They played 6 games within the division, 6 games against other NFC opponents and 5 games against AFC foes. That makes 35.3% of their games were against division opponents. That is the same number of games within the division as against other NFC teams.
The current format and scheduling has reduced the impact of winning the division. The same rewards shouldn't apply. Win the division, make the playoffs, but base home field on overall records.