The major thing that SWR 1.0, 2.0, and Fote all have in common is being derived from Smaug 1.02a. As I understand it, swr 2.0 is more generic as far as sci-fi and Star Wars. As a codebase it never really caught on from what I can tell. Swfote is more or less the result of one mud's modifications to the base code that they then released. It became quite popular obviously.
There is no FUSS version of swr 2.0 and there are no plans to do so. The base just never acheived enough usage to make the effort worthwhile. That wouldn't stop someone from doing the work on their own though. That's why all of the fixes are posted here.