Yeah, JPII, upon finding out about pedophilia and child abuse, took steps against them. However, keep in mind that while the Catholic Church is an absolute monarchy, it's also horribly bureaucratized. Cardinals do wield a lot of power, too, and it's incredibly difficult for one man, even the Pope, to make changes to something like that. Those things came to light under JPII's pontificate, but were hardly new phenomena. It's just that before, they were not even spoken about. The Church's way of handling this was pretty bad, but to say John Paul II did not take action against them would be unfair. He certainly did not endorse this, and did condemn that behavior.
Personally, John Paul II was a great Christian, and a great man overall. He famously forgave a man who nearly assassinated him, opened the Church towards other religions and brought it towards young people. He was the Pope during an incredibly difficult time, and had a very big role in fall of the Communism. We should not forget the great things he did just because he did not handle the pedophilia scandal as well as he could have.
I believe he is worthy of being a saint. He was not perfect, but neither were the other saints. Was he good enough, though? Well, the committee seems to think so, and they did investigate the matter closely, precisely because of the controversies. What can't be denied that he changed a lot, I think that mostly (but not exclusively) for the better.