1) Implemented in the next release. A new $vw_context variable, which contains the current wiki page info, is exposed to all templates. This should make it viable for basic-type navigation links and conditions in XenForo 2.x. $vw_context is also exposed to the navigation manager in vBulletin.
2) In the next release, added a new setting to automatically check the box to activate wiki-functionality for new social groups in vBulletin, if the user has permission to use that box. The default value is now checked.