What is the excessive importance of filoques, creeds and homilies in Roman Catholicis

What is the excessive importance of filoques, creeds and homilies in Roman Catholicism for?

Are you asking about parts of the Catholic Mass?

Without them, it wouldn't be Catholic.

I haven't had much exposure to Catholicism but I used to work for a Greek Orthodox school. In the Greek Orthodox Church, Homilies, etc are quotes from saints which are wise and useful in guiding us in our spiritual life.