Very interesting. A personal coach is certainly the most efficient way to improve.
My main concern is about the legality of such a software. Even if the data is presented on screen and available, changing the UI to help the player is not accepted in all games as it can provide a strong edge. For AoE2, part of the game is about scouting and remembering key information while managing your economy.
Thanks for the comment. We don't change the UI but provide some verbal notifications. An analogy, would be making a beeping sound when there is an idle villager.