So there was an article with comments by Rabbi Dratch on JTA. It makes sense (though Rabbi Dratch does not quite speak for the whole of the RCA). This wasn’t about Geirus at all.
Basically, Avi Weiss gave the Rabbanut testimony that someone was Jewish. After speaking with some RCA members, the Rabbanut decided that Avi Weiss has no Ne’emanus on anything and cannot testify to someone’s Yahadus. That was what the RCA was against. They believe Avi Weiss is misguided but that he (as an individual) is still Kosher. This has nothing to do with YCT, Zev Farber, Shmuly Yanklowitz, or anyone else. It has to do with the reliability of Avi Weiss saying that someone was born Jewish.
I don’t know if this makes things better or worse, but we just need to clarify the exact case here.