DaveC in all honesty if you're creating a game which is so complex within F2.5 then you need to expect that you will potentially need to finish it in the more than capable F2.5 and not F3. We can't talk, as I've said time and again, about the specifics you need to know to answer questions like that, not least of all because not everything is coded yet and we just don't know!
We have said all along and I continue to say that whilst I understand your excitement for F3, and that some people want to know everything they can possibly know now now now! we have been clear that we cannot release more information right now and if CT seems angry, perhaps it is more your read on us just having to repeat the same message again and again and again. There are only so many times and ways we can say the same thing and yet certain users insist on challenging us relentlessly.
We highly value our users and will release what we can, when we can - you have my assurance on that.