Saint Pius V removed Saints Joachim and Anne (parents of Our Lady), Anthony of Padua, Nicholas of Tolentino, Francis of Paola, Bernardino of Siena and Elizabeth of Hungary. He removed the feast of the Precious Blood and removed the word "Immaculate" from the title of the 8 December feast of the Immaculate Conception of the Blessed Virgin Mary, abolished the previously existing special Mass for that day and directed that the Mass of the Nativity of Mary should be used. http://en.wikipedia.org/wiki/Tridentine_Calendar
That gives perspective!
I would like to add that I am by no means being critical of Saint Pius V, and he no doubt had valid and appropriate reason for his actions
at the time. Most of the saints he removed from the calendar were re added by his near successors, though from my reading the Propers of the Immaculate Conception were not added back into the missal until Leo XIII.
I'm happy that you are seeing the perspective! My point was that there are 10,000 plus saints recognized by the Church, and popes have been putting them on and pulling them off of the calendar for centuries. It is also my understanding that even though a recognized saint is not on the calendar anyone may manitain a personal devotion to them.