I have often wondered why this cardinal was not on track to be canonised. His cause was opened over fifty years ago and went no where.He was, by all accounts, deeply spiritual, humble and his works of charity and mercy are legend. He was a good confessor and great speaker. Profoundly prayerful. He also served well the saintly Pius X as his secretary of state. He was also hardworking and brilliant in thought. He was made a monsignor while still a seminarian! What went wrong with this cause?
"What went wrong with this cause?" You will find some clues in Wikipedia'notice of the cardinal, french edition.
I believe all the documentation of the Cause is sitting in the Spanish College in Rome. There is still officially a Postulator. Perhaps he (and the Cause) need a little encouraging?
I think it is because all the proceedings are very expensive, so unless someone is a member of a rich religious order or congregation, it is impossible that he or she becomes (proclaimed )a saint. This is the case with the carthusians (it is common knowledge that they do not have millions of dollars to spend this way: they are rather poor). Merry del Val was a priest, even from a noble family, but still a priest.