It would help if the new rationalist website had a more professional design, and emphasised its compatibility with mainstream science, e.g. by linking to high-status scientific institutions, and sometimes writing completely uncontroversial articles about what those institutions do. In other words, the new website should be optimized to get 100% approval of the RationalWiki community. (For someone trying to do this, becoming a trusted member of RationalWiki community could be a good starting point.)
So … RationalWiki, then.