One is that we're engaged in our own internal culture-war around liturgy, the dwindling priesthood, and what to do about social issues that pit Western society's priorities against long-standing Church doctrine. When the most prominent Catholics in the news aren't acting Catholic, that drives us crazy.
But I don't think pluralism is really the problem; Catholics, at least in America in my lifetime, never had any kind of puritanical control. The problem is that there's a new amorphous religion of the state that insists it doesn't exist.