One seemingly little detail occurs at the end of John 5 and elsewhere in the Gospels. The idea is that the prophets had written about Jesus and there was enough evidence to 1) guide people to Jesus and 2) give ideas to live by. He says Moses condemns them and then in His implications is the fact that God is still working – like they missed the point.
If Moses has given them enough, why the confusion? Man-made interpretations of the law leave us wanting for more – as if He has/had a better way. He does! We need to believe that and live accordingly?!