The site is about rationality, not dogma -- I think. Posts should be judged on the strength and clarity of their ideas, not the beliefs of the individual posters who espouse them. To categorically exclude an entire class of people -- some of whom are very good rationalists and thinkers -- simply because they don't subscribe to some LW party line, is not only short-sighted, but perversely, seems to run entirely counter the spirit of a site devoted to rationality.

The consequences, I imagine, would be less interesting, less broad discussion, with a constricting of perspective and a tendency to attract the same fairly narrow range of people who want to talk about the same fairly narrow range of topics. It will select not for good rationalists per se, but some mix of people who overly fancy themselves good rationalists, as well as the standard transhumanism/Singularity crowd that's here because of EY.