I believe at this point the reason for the absence of a release is that the team is being cautious and not willing to make a release until all platforms are equally supported.
Indeed, there are some difficulties because of the new compiler and 64 bits - old tools are not working, some people are away and could not fix them (the ones that are fixable). I made some scripts to find offsets for osx and win64, and then we were fixing issues with data structures, and as I understand, they should be more or less ok. However offsets for some other platforms/bitnesses are less complete. I can probably write scripts for linux64 if needed, but I'm not interested in doing any 32bit work (my opinion is that we should drop 32bit support to make our lives easier). As I understand, scripts that allowed to automatically check data structures are not working anymore as well, so we don't know if the structures are ok until some plugin crashes. Also, it would be good to understand whether we're waiting for jj to fix Ruby scripts, or willing to move on with something else.
Anyway, I personally think some alpha version for osx/win64 could be released now. Or are there are any specific (missing/broken) things that holding off the release?