Hello deathruin,
I'll forward your ideas to our team for a review, thank you.
About 4, do you report that military architecture doesn't reduce the time for building the next fortress level if there already is a fortress level in progress or another problem?
No, there is a technology calculator under help menu-->tech tree. It can be used to calculate the cost and completion time of buildings and technology. But as it currently stand, it does not take MA into account for calculation of fortress construction time, making it inaccurate.