How are changes being documented? If we need to revert to an older version for some reason, is that still do-able? How can we manage features, or otherwise toggle them on or off?
...For instance, if we wanted to create a mod with more realistic physics/dimensions, how would we control how the game processes this information? I'd assume we'd do it via .ini file, or some other thing of that sort, but there you go. At some point, there needs to be a larger scale to the planning and implementation of features (hence kind of why this thread is here); I suppose the question should be, "what will be done to manage the development and expansion of the simulator?"
Aside from the more esoteric questions, I guess what should be asked for first is, "when will multiplayer be fixed?" Hands down the best thing to do would be to fix what's broken, and then expand on the features. That is, certainly, easier said than done.
...Also, if we ever move the engine over to OpenGL, then it can be made cross-platform. Then everybody wins.