I think these are some great ideas. I'm new to the game and I think that even some of these ideas added in game would add a lot of depth in gameplay. Currently it feels that you can rush the tech-tree pretty fast and gain access to the best stuff a bit too soon in my opinion.
I think people are not going to stick for the long run just for building structures, unless there is dedicated server / community running things aka like lifesim. Just my two cents.
Great ideas and for the devs, keep up the good work. It really shows you put some love and dedication to the game.