1980 was the last UNC ACC championship in football. But 1981 was a team that in some ways was better, even with 2 losses. One was because turf issues meant that we were short 5 or 6 starters (GT easily had the worst turf in ACC history). The other was by 2 to eventual National Champ Clemson. Danny Ford and a number of Clemson players said after the season that their toughest game al year was not UGA with Herschel Walker nor Big 8 champ Nebraska but UNC.
I think the doing less with more begins to apply in late 1983 and then takes over the rest of Crum's tenure. It may have peaked in Mack Brown's first 2 seasons: 1-10 and 1-10. It has never gone away.