Even if the CMG is still a "rough draft" and has yet to reach a final form, the work of your developers is nothing short of brilliant!
The idea of having a simple A.I., that generates missions based on rule sets and layered elements, seems to be so useful that it's a wonder nobody has ever attempted to develop a similar tool during the years since SH3's release.
I think the idea of a web-based interface, whether using AJAX or C++ code within a PHP wrapper, would make the CMG accessible to the greatest number of people. It would also allow updating the rules and elements by simply plugging those new values into an XML table.
Whatever the CMG group decides to do with a release of the software, you've still done great work. CMG will rank right up there with SH3 Commander and JSGME as one of the "must have" add-ons for SH3!