About the conversion between C-Script and Lite-C you are right, but I don't see what it has to do with creating additional forums. This would require Conitec to clean the errors in the GameStudio manual and refresh with more examples. Also the community can contribute tutorials and such which is being done all the time.
Almost forgot, but George created Lite-C workshops. And in new releases of AUM started with presenting the new language to the readers, plus included some conversion hints. In the Lite-C contributions forum there is a list with required command changes and so is inside the manual, although it could be more.
IMO newcomers should focus on Lite-C instead of C-Script. If you really need to program something from the start, doing it in Lite-C isn't much harder to learn.
OT. I think nobody would mind if you ask a C-Script or Lite-C based question in the AI forum for instance. Do you want to see more forums for C/C++/Delphi? Sure this would give clear oversight, but also presents extra moderator work.