Just about every one of my professors has discussed this topic during class. Apparently they have done recent studies on LSAT correlation, GPA correlation, 1L grade correlation, etc and I dont think they have come to a strong conclusion.
We have a pretty amazing faculty and most of them have teaching experience at other schools. These professors say that our curriculum is on par w/other schools, and further they say that students that take "bar" classes do not necessarily do better than students that take random classes such as Russian law.
I do know they are trying new things. For example, they re-did the 1L curriculum, giving us 3 substantive class that last only a semester rather than 5 of 6 that last the full year. They are trying to get us comfortable w/the bar material from early on by giving us sample test questions, arming us with info, etc. There are numerous initiatives - I cant speak about all of them.
I obviously have not been a law student at another school, but I strongly believe that I am getting the foundation I need in my 1L classes. So... to answer the question, I have no idea why the bar passage rate isnt stronger.