Yup. The original thresholds were too high. So anything that wasn't perfect wasn't kept.More or less, but the approval thresholds skew quite high. “Mid rank” here means around 70% positive scores.
So by the end of the playtest, a ton of stuff had to be designed internally without playtest to get the book out.
Like 90% of the DMG. Crawford said the 2014 DMG was rushed because they spent so much time redoing the PHB stuff there was not time to look at the DMG.