the mod will be a part of the R.E.D. DLL for BNW (because I've ported the code for culture diffusion to the DLL side, it's now faster...), I have a version almost ready for release but my last test show some very big lag when selecting units while at war in multiplayer and I want to have a look at that before making it public, even if I suspect it to be a vanilla issue with the sequential/hybrid mode...
the development version is available here:
https://github.com/Gedemon/Civ5-RED-DLL-BNW-Build (download the zip or use Git)
It's the project, you have to build it with modbuddy if you want to test it.
Now for your question, I know that have changed a few thing during the inclusion in the DLL mod (but they are marginal for Revolution, and mostly Lua, while the whole Cultural diffusion code has been rewritten), but I don't remember if it could have fixed that...