Have just read through this thread (not yet downloaded, as I still have a demo game to go) and it really reads like a small gem!
Some remarks:
a) You stated that while your stack will be limited to 10 units (including cargo of ships) the AI may use up to 16 units of its units.
b) Furthermore, in the opening pages you mentioned that the attacker gets the ability to detect the defenders formation, while the defender gets the first shots.
To a): Admitting that I haven't tested it for my own yet, I would think that this ratio would be too much in favour of the defender. I acknowledge that this may be a matter of discussion or personal taste, so my question would be if there is some setting in .xml-files, to change this?
To b) Once again, clearly a matter of personal taste, but could this just be flipped? I think the attacker should get the advantage of determining when and where the first shot is to be fired, whilst the defender still is based in his "fortifications". Therefore, I would think that the first round of attack should go to the attacker, but at the cost of revealing his formation to the sight of the defender.
Just my thoughts. Otherwise, it sound absolutely impressive and will become a must have after said demo game is finished.