This is a very interesting observation. Could you please elaborate. 
I was under the impression that the canonical process for selecting bishops has never been changed since well before V2, and remains unchanged today? That is, the current ordinary sends three names to the nuncio, who investigates and forwards his info to the congregation for bishops which selects and forwards that choice to the pope for confirmation?
What did change, as I understand it, is (1) only the guidance give by each pope to his nuncio and the congregation, and (2) the abnormal practice of JP2 and B16 to reject the names on the "terna" in favour of others, just vitiating the last vestige of local input into the process.
Am I wrong?