As you know, we've had very polite by pointed theological debates in the past.
As to your specific points:
(1) That the priesthood attracts pedophiles and homosexuals. Any profession that holds out the opportunity of spending time with children while being placed in a position of authority or supervision over them will attract pedophiles. The ongoing situation in America's public schools is an excellent case in point.
Plenty of clergy in other Christian denominations have been arrested for similar crimes for the same reasons.
One could argue that homosexuals might gravitate to the priesthood because it is a good "cover" for a man who, if a layman, would be obviously a "confirmed bachelor." That's less of an issue lately, since the shame and scandal of public homosexuality no longer exists in our society.
(2) You say that the problem "continues unabated." To the contrary, since the CDF took over the role of investigating these claims, the number of new accusations has declined dramatically. Several hundred priests in that timeframe have been dismissed from the ministry and every diocese in America has adopted new policies and safeguards. Even before 2001, the majority of allegations involved incidents occurring during the period of 1965-1980 - a time when the Church was in great disarray.
(3) You continue to imply that the CDF was in charge of investigating these crimes during the period of 1981-2001, which is simply not the case.
(4) You reiterate the claim that the instruction on Crimen Sollicitationis was intended to punish those who went to secular authorities regarding crimes. That is simply not the case. The claim about such informers being subject to excommunication is simply out of order - the instruction says absolutely nothing of the kind.
(5) The doctrine regarding the nature of ministry isn't really material. The idea that Father Bill McGowan is able to offer the Eucharist and hear confessions and solemnize marriages not because Bill McGowan is so great but because he is simply an instrument Christ uses to exercise His earthly ministry isn't really a factor.
The issue is that anyone who holds an office of ecclesiastical authority - be he a Catholic priest or a Presbyterian elder or an Anglican parson or a Baptist pastor - can potentially misuse his authority.
Both Reformed Christians and Catholic Christians agree that their pastors are instruments used by the Lord and that as persons they have no special merit in themselves. Where Reformed and Catholics differ is in (1) the nature of the duties they perform: Catholics believe that Baptism is truly regenerative and that the Eucharist is truly transubstantiated and (2) the duration of their obligations: Catholics believe that priests are forever marked by their ordination.
(6) You claim that Benedict XVI was "personally at the center" of the latest news story. He wasn't. First, clearly the perpetrator was the person at the center. Second, the individual who enabled the perpetrator - Msgr. Gerhard Gruber - already came forward and admitted that he facilitated the reassignment of the perpetrator in question.
Here is a copy of the actual letter sent out in 1962. Note paragraph 11 which specifically lays out the punishment of excommunication for anyone speaking about these accusations/crimes.
In quickly glancing over this document I also noticed PARAGRAPH 42a which says that if the council deems the alleged victim's accusations to be without merit, then all the "documents of the accusations should be destroyed."
We can only guess the size of the Vatican shredder.