Anything that forces teams to run up the score in blowouts, or protect your margin on the wrong side of a blowout is stupid. It's stupid for sportsmanship, and it's stupid for developing your depth and younger players.
Perhaps more than that, anything that locks in conference power before conference play starts is stupid, and punishes conferences/teams that get better as the year goes on.
Margins and efficiency should factor in, but they shouldn't be a dominating factor.
Let's say we win the next 3 and lose at Clemson, then go 1-1 in the ACCT with the loss to UNC/Duke. We'll be 21-12, two of our best wins down the stretch, and 2 months removed from those blowout losses. In the old system there would be a lot of talk about, "They played tough teams all year, and they went from getting blown out by them to competing and snagging a marquee win over UNC at home, then at NC State."
But instead it's like, "Oh, their NET sucks, NEXT!" If that's the case, then we were dead on January 14.