The 1955 Reform of Palm Sunday

NLM

First Mr. DiPippo begins with a claim about the 1955 Holy Week reform:

This divorce communicates the Protestant idea that the Last Supper, and the rite which Christ instituted thereby, were merely a commemoration of the Sacrifice of the Cross, rather than the anticipation of the Sacrifice and its perpetuation in time, as the Church believes and teaches. I then explained how the post-Conciliar reform undid this change in some respects.

As the Church teaches, or the patriarchate of Rome?

The rest is useful information, especially the comparison of the Roman rite with other rites with respect to Palm Sunday, and it is probably the case that the texts of the 1955 reform are deficient in comparison with what preceded them.