Then we see something like the acts of Henry VIII earlier. In that, I mean the break between England and the RC Church. Perhaps not as extreme, and for different reasons, but we see a definate loosening of the religious ties with the Papacy. Parliament had already been busy passing laws along similar lines anyway.
J of was a great supporter it seems of John Wyclyff and the Lollard movements. Chaucer, a great friend and subordinate of J of G, seemed to have a penchant for writing pro-Lollard stuff anyway. I think that J of G might have even put him up to it.
So, with J of G as head, I think we see a real reform movement. Probably even no Peasants Revolt of 1381.