If you have further information which demonstrates your position, I'd love to see it. Thanks.
Plus, the current canonization formula does not meet the requirements that the First Vatican Council laid out for ex cathedra teachings.
In the case of JPII, Pope Frances short circuited the Canonization process and decided to go ahead with the Canonization before the second miracle, normally required, was certified. I believe it has since been certified.
The Pope can only define dogma within a limited realm. The First Vatican Council teaches us the limits:
"Therefore, faithfully adhering to the tradition received from the beginning of the christian faith, to the glory of God our saviour, for the exaltation of the catholic religion and for the salvation of the christian people, with the approval of the sacred council, we teach and define as a divinely revealed dogma that when the Roman pontiff speaks EX CATHEDRA, that is, when, in the exercise of his office as shepherd and teacher of all Christians, in virtue of his supreme apostolic authority, he defines a doctrine concerning faith or morals to be held by the whole church, he possesses, by the divine assistance promised to him in blessed Peter, that infallibility which the divine Redeemer willed his church to enjoy in defining doctrine concerning faith or morals. Therefore, such definitions of the Roman pontiff are of themselves, and not by the consent of the church, irreformable. So then, should anyone, which God forbid, have the temerity to reject this definition of ours: let him be anathema."
This formula fails to meet the requirements above:
The Pope then pronounces the following or a similar formula: "To the honour of the holy and undivided Trinity, for the exaltation of the Catholic faith and the increase of the Christian religion, by the authority of Our Lord Jesus Christ, of the Holy Apostles Peter and Paul, and of Ourselves, after mature deliberation and many petitions for the Divine assistance, with the advice of Our venerable brethren the cardinals, patriarchs, archbishops and bishops at present in Rome, We decree and define that N. is a saint, and We insert his name upon the catalogue of saints, commanding that his memory be annually venerated by the Universal Church upon the day of the month. In the name of the Father and of the Son and of the Holy Ghost."
We're not bound to hold such a person is a saint by faith by the formula, only by religious submission to venerate his memory annually.
I don't believe that Pope John Paul II's canonization will be taken off the table, though. I'm not in the least saying that I don't hope that he's enjoying the beatific vision right now, but his pontificate was not really one that was demonstrative of heroic Christian virtue, either. He was merely popular and well-liked by the secular media.
Concerning your last statement....
"...., but his [JPII's] pontificate was not really one that was demonstrative of heroic Christian virtue, either. He was merely popular and well-liked by the secular media."
My comment: I completely and vigorously disagree, but to each his/her own. It seems (to me) as if your mind is made up, and I do not intend to take on the task of trying to change it.