I don't mind calling it the "Catholic Church".  We certainly should not call it the "universal Catholic Church."  Among other things, this simply isn't true - it's not universal!  Among other things, it is repetive - "Catholic," strictly speaking, means "universal."  It's fine to call it the Catholic Church, because Catholic has mostly lost its old meaning of "universal" in favor of meaning "pertaining to the Catholic Church."  But that is not true of the word "universal," which ought to be avoided.