I don't think criticism of Pope JPII was necessarily rooted in Charity.
I think jealousy permeated a lot of the criticism aimed at him. He used the technology of the age in such a way that he demystified the Papacy in certain ways. He didn't totally demystify it, he made it and the Pope more approachable. I don't really think there's anything wrong with that.
He may have merited some criticism, he was capable of error. He was capable of not seeing his error as error. He was capable of being hard-headed, prideful, etc. Until the Pope is no longer fully human, how can we defend against this? Whatever his errors, his critics are the ones who seem incapable of forgiving him.
As far as the Saint thing goes, I think it's a little premature too, but doesn't our History recall that many people were raised to Sainthood shortly following their death, and mainly because of a similar type of popularity?
*some were recognized as Saints while still living. One (among many examples) such man was St. Vincent Ferrer, another St. Francis - it is a LONG list.
Be aware that Ferrara is a nutball who is among those imagining that they are orthodox and the Magisterium heretical
Oh it's going beyond just wanting to make him a saint. Here's a quote from another article:
Hundreds of messages of thanks and remembrance were posted Sunday on "Karol the Great," an Italian Web site set up in tribute to John Paul. The pope's given name was Karol Wojtyla, and references to "John Paul the Great" have gained steam amid a growing movement to make him a saint.
"Bye, Pope John Paul, you will always be the greatest, even in heaven," read one.