In the Forward, David A.M. Wilensky, a patrilineal Jew, shares his story of undergoing a Conservative movement conversion so his Conservative congregation would accept him as Jewish, and argues that he ought not to have needed to do so:
...It’s an intolerable, unsustainable situation. I don’t begrudge Orthodoxy its understanding of Jewish law — it is what it is. Conservative Judaism is another story. If Reform Judaism weren’t the largest denomination, the argument that it has irreparably torn asunder the Jewish community in accepting patrilineals might carry some weight. In the real America, though, Reform is the largest movement and the majority of American Jews don’t belong to any Jewish denomination. In my experience, these harder to categorize Jews couldn’t care less about my mom.
The Conservative rabbinate protests that it cannot recognize patrilineal descent because that would violate its understanding of Jewish law. Coming from people who drive to services on the Sabbath, that reeks. When reality, reason and the changing worldview of the Jews in the pews have called, the Conservative movement has managed to trot out new Halacha that changes the previously unchangeable.
Essentially, Wilensky makes the classic slippery slope argument, but from the pro-slip side. It's a powerful argument, the basis for which accords (as Wilensky acknowledges) with an Orthodox understanding of the ideological topography. I don't envy Conservative leaders who want to maintain status quo -- they have the task of persuading their right flank in the movement that the slope won't slip, and their left flank that it oughtn't.