There is no morale in Age of Empires 2, so the simple answer is no. You would need access to the source code if you ever wanted to program something in that could handle this. Most of us know the answer if Microsoft would ever release the source, and the answer is a big fat NO!
I would be willing to bet if Ensemble Sutdios published the game & funded it independently (and not Microsoft) there would be more bug fixes/patches for the game, there would be a lot more tools and I wouldn't be suprised if the source was released one day because most of us know Ensemble are a very generous developer, I should say were a generous developer.
If you wan't have morale/experience/unit promotions you need to take a look at the dmcr AC version engine which my mod is using. Also another engine you might wan't to take a look at is the Total War 1 & 2 engine, which also has a morale system, but I personally don't have any experience with this engine.
[This message has been edited by ELiTE TEUTONiC (edited 03-08-2011 @ 07:08 AM).]