It's one of the more horrific innovations in the Mass.
One of the things that breaks my heart the most. The Confiteor is one of the most beautiful and heartfelt prayers you can say. When I say it, it reminds me how much of a sinner I am and how much I offend Him but it also reminds me of how sorry I am. What prayer brings you to the abject low and the highest high all in a few sentences? It's also kind of a summation of the human race.
I don't know why both the Confiteor and the Kyrie Eleison can't be said.
I honestly believe that most Catholics don't realize what they are missing until they hear it again... that goes for the longer Eucharistic prayer which is hardly ever said. No longer any mention of the Blessed Virgin Mary or "all the angels and saints n."
That is a total break with our Catholic heritage - the "communion of the saints" - something else you never hear. I hope and pray to God that I am passing this down to my own children in such a way that they will treasure the gift they have been given.