Since 1/1/23 Teams that are ranked in top 25 (KenPom) as VISITORS when playing against teams that are not as good as them (i.e. ranked in the top 50-100 (KenPom)) only cover 46% of the games.
Good team on the road against teams that they should "easily" beat, only cover 46% of the time.
When you stretch it to top 10 team on the road vs a 50-100 ranked home team, the win % ATS goes up to 53%. What this means is that as you get to the very good teams in the NCAA they do better and better than expected on the road ATS.