A Law Professor, and critic of law schools in general, Paul Campos disagrees with you:
The Cal Bar is changing this summer to a two-day format, but recent iterations have been against nationally-normed and scaled tests.
What is most likely happening is that back when Hastings had an 80% first time pass rate (2010), most of its then students barely passed. (Yeah, I know a pass is a pass is a pass, particularly on the hardest test in the land, at least with pass score.)
But statistically if all of a sudden, the quality of the students decline slightly – and they have been declining everywhere, even at Harvard and Stanford, due to the massive decline in LS apps – those students who used to average barely passing, now end up barely not passing.