I don’t think that anyone was aware that the 1955 Holy Week would turn into a whole new Mass by 1969.
The Novus Ordo was actually created by many of the same people (Bugnini for instance) who were responsible for the reform of Holy Week. As with Holy Week, the architects of the Novus Ordo claimed (rightly or wrongly) that it was leading the Church back to more a more authentic tradition and ditching medieval accretions. They did not see it as creating a ‘whole new Mass’.
The Novus Ordo certainly didn’t come out of nothing. Even the most reactionary prelate in the Roman Curia, Cardinal Ottaviani (famous for his Intervention), celebrated a very unedifying Mass facing the people at the 1953 International Liturgical Congress. All the main liturgical reforms standardized in the Novus Ordo have a preconciliar history.
Consider this extract of an article by the Rev. John Fennelly, P.P., published in
Doctrine and Life, November, 1955:
Discussion on the introduction of the vernacular into the Mass rite itself would be outside the scope of this article. An increasing volume of liturgical opinion favours a limited use of it in the forepart of the Mass. The Mass of Catechumens would therefore resume its former role and primary function of instructing the people. At the International Liturgical Congress in Lugano (1953), a strong recommendation was forwarded to Rome by the delegates assembled, that the Collects, Epistle and Gospel should be heard directly from the sacred minister or ministers in the language of the people. Permission to use the vernacular in the administration of some of the Sacraments has been granted to many countries.
The use of the vernacular by the people is a totally different matter. A notable change has taken place within the past thirty years in Church policy with regard to hymns and prayers for popular use at quasi-liturgical functions like a Holy Hour. The general tendency nowadays is to encourage the people to pray and sing in their own tongue. The Germans are permitted to sing the common of the High Mass in German. It does not seem reasonable to force Latin on the ordinary congregation, if the people can be permitted to ‘pray the Mass’ in a language they understand.
…] Fr. Pius Parsch, an Austrian, who died in 1954, is credited with the discovery of the best method of popular participation devised in our time. Fr. Clifford Howell, S.J., the well-known writer and apostle of the liturgical movement, thus describes it in an article in the Catholic Herald, of April 30th, 1954. ‘Fr Parsch had many remarkable achievements in the practical sphere. He is likely to be remembered best for a certain form of communal public Mass called the Betsingmesse (“Prayer-hymn-Mass”), which has now spread throughout the whole of Austria and Germany. This is a very practical and logical combination of two forms already in use: the Missa recitata or Dialogue Mass and hymn-singing during Mass.’
…] Common prayer, seasoned with a little singing, is a reasonable contribution to ask from the faithful towards the splendour, dignity and social character of the Sacred Mysteries. It is the most and the least to expect from the average congregation assembled for Mass in the Parish Church here in Ireland or, perhaps, anywhere.
…] And though Penal days are long gone by, the people have not regained their voice or attempted to take their rightful place in the Sacred Liturgy …] Few are prepared to maintain that the Plain Chant revival movement, into which the schools have thrown themselves wholeheartedly, has yielded the results expected of it.
…] The social and liturgical movements now stirring the Church are closely connected and inter-dependent. One cannot succeed without the other. Both set out to correct excessive Individualism and lead to the formation of the Christian community. Both derive their inspiration from the doctrine of the Mystical Body. Neither movement can be hurried. A whole generation may pass away before the social and liturgical teaching of the Popes becomes an active force influencing the public mind and penetrating into the sanctuary of the Church.
…] It has been noticed that both these reform movements within the Church make striking progress in areas where the Church is subjected to severe pressure. At the International Liturgical Congress of Lugano, 1953, Bishop Weskham, of Berlin, could testify to the rapid progress of every kind of liturgical endeavour in the part of his diocese under Soviet control.
…] There is no denying that the Roman Mass rite, as it stands, is ill-adjusted for teaching the populace or training their minds towards active, intelligent, and social participation. Fr. Clifford Howell, S.J., goes into this matter fully in his popular book on the Liturgy The Work of Our Redemption. Not only is there a lack of adjustment between the individualistic-minded laity and the communal-minded Liturgy, there is also an element of aloofness and elusiveness in the liturgy itself. In addition to the barrier of language, there exists a number of features that militate against intimacy. That is particularly noticeable at a low Mass. The priest has his back to the people and even when proclaiming the good tidings of the Gospel, does not face them. The present Mass rite and the rubrics governing its celebration were framed in the sixteenth century, at a time when participation on the part of the people was at its lowest ebb. Little change has been made since the time of St. Pius V. …] Admission of the vernacular into the Mass rite would, at the time, have been equivalent to sanctioning doctrinal error and opening the door to devotional and liturgical chaos …] The matter can now be debated on its merits.