They should go back to the original form of Church government that the Church had for 1000 years.
Do I see a lessening of Papal Supremacy in this move? This collegialityy thing has not made too much difference in the modern age of the Papacy since the Pope has the last word in any decision, but the language is interesting nonetheless.
Meh, a bit interesting, sure. But no, until the Pope of Rome says, "Ok, fellow bishops. Rule your dioceses independently. I will just deal with Rome, m'kay?" - I don't see it happening.