David Fair,
I don't find neither side owerpowered/underpowered as posters above. If anything this patch has brought equlibrium between the two. Granted down the line of historically uncorect differences per side as you claim. Would defenitely be interesting to observe if any changes to the game as suggested by you to favour historical realism more, would make the game more interesting to play.
I suspect game design which favours bigger differences between the two sides that were actually historically present is on it's own in this game to make each side more unique to play ie. more interesting from the casual gamer/laymen point of view.
BTW David, you must have tried AGEOD's Civil Wars II. I've just got it myself but since I'm not that familiar with the whole war am wandering what's your take on it. How many things portrayed wrong in it? Is that game a more faitful representation of the actual conflict then UGG?