Remember that the FIRST game in a series, IS ALWAYS the BEST game!!
Well, a matter of opinion obviously. It depends upon what you like to see in the game. I like BoA simplicity, (i.e. no ecomony, no politics, no other stuff). Its more or less a pure wargame. I can play it to conclusion (1776 scenario) in an evening, and my 12 year old son, has a shot at enjoying it without getting mired into taking 45 minutes to make a move.
To some, this is not enuf, but for me it is. I would like to see BoA engine used for tactical level stuff. Like Civil war battles and the like.
And for BoA2, my wishlist would have included an ocean of more graphics (units/models), not more game functionality. But, I am not trying to SELL the darn thing, so there! A lot of the things I did with my mods was to UNDO some of the changes that were made to BoA, and to move it back closer to its original design. (like eliminating tracks, and the leader protections, etc..).
In five years, BoA will be considered a classic game. I am going to sell my copy on EBAY for some big bucks then.