Regarding the "Ottaviani Intervention," a few points:
1.) The "Intervention" was sent to Paul VI in Sept of '69. In Nov of '69 Paul VI addressed some concerns in his General Audience:
http://www.ewtn.com/library/PAPALDOC/P6601119.HTM9. The second question is: What exactly are the changes?
10. You will see for yourselves that they consist of many new directions for celebrating the rites. Especially at the beginning, these will call for a certain amount of attention and care. Personal devotion and community sense will make it easy and pleasant to observe these new rules. But keep this clearly in mind: Nothing has been changed of the substance of our traditional Mass. Perhaps some may allow themselves to be carried away by the impression made by some particular ceremony or additional rubric, and thus think that they conceal some alteration or diminution of truths which were acquired by the Catholic faith for ever, and are sanctioned by it. They might come to believe that the equation between the law of prayer, lex orandi and the law of faith, lex credendi, is compromised as a result.
11. It is not so. Absolutely not. Above all, because the rite and the relative rubric are not in themselves a dogmatic definition. Their theological qualification may vary in different degrees according to the liturgical context to which they refer. They are gestures and terms relating to a religious action—experienced and living—of an indescribable mystery of divine presence, not always expressed in a universal way. Only theological criticism can analyze this action and express it in logically satisfying doctrinal formulas. The Mass of the new rite is and remains the same Mass we have always had. If anything, its sameness has been brought out more clearly in some respects.
2.) Also, the "Intervention" was written BEFORE the first Latin edition of the Roman Missal appeared in March of 1970. That edition included a doctrinal exposition of the Mass meant to address certain concerns in the "Intervention."
3.) Paul VI asked the Congregation for the Doctrine of the Faith, the department of the Roman Curia that Ottaviani had earlier headed, to examine the Short Critical Study. It responded on 12 November 1969 that the docuмent contained many affirmations that were "superficial, exaggerated, inexact, emotional and false".[http://www.clerus.org/clerus/dati/2000-12/07-999999/Ch1.pdf p.21]
4.) A letter of 17 February 1970 signed by Cardinal Ottaviani and addressed to Gerard Lafond, was published in La Docuмentation catholique 67 (1970), pp. 215–216 and 343. It stated:
"I have rejoiced profoundly to read the Discourse by the Holy Father on the question of the new Ordo Missae, and especially the doctrinal precisions contained in his discourses at the public Audiences of November 19 and 26,[5] after which I believe, no one can any longer be genuinely scandalized. As for the rest, a prudent and intelligent catechesis must be undertaken to solve some legitimate perplexities which the text is capable of arousing. In this sense I wish your "Doctrinal Note" [on the Pauline Rite Mass] and the activity of the Militia Sanctae Mariae wide diffusion and success."
The letter also expressed regret on the part of the cardinal that his letter of 25 September 1969, which he did not disown, had been published:
"I regret only that my name has been misused in a way I did not wish, by publishing a letter that I wrote to the Holy Father without authorizing anyone to publish it."
I've started a new thread on this topic here:
http://www.cathinfo.com/catholic.php?a=topic&t=22201