Agreed. But when it comes to "fruitful" divergence still with us today, my hope is that the treasures to be found in Orthodox thought and in that of other early branches of Christianity will be mined of kernels the Roman Church needs. We saw a glimmer of the possibilities there in the synods on the family, where Kasper was attempting to draw on the Orthodox understanding of divorce and remarriage. Our majority "pinhead" theologians with way too small minded to go there with Francis and Kasper. 

Sad really.