I'm not sure if that's a weak trolling attempt or serious complaint about lack of relations to the game made by people who get paid.
Honestly, I didn't even expect it to be EVEN a bit similiar to Empire Total War, the title isn't a thing to follow or to make some vivid hopes/expectations.
And really, you've got more than five hundred posts on HW, how come you're complaining about the visual aspects (to be really serious, I think many units are actually accurate[for the EU side at least]). I'm just really curious, because W3 perfectly limits the modding possibilities, ask Fingolfin about that, I'm sure he will agree.
Anyways.
I really enjoyed the map myself, it's advanced and there are dozens of nice features, I liked the popularity system, however - it lacks somekind of notice system because I totally don't feel like recapturing the most of burghs over and over again due to some unknown issues.
Yet, I've got mixed feelings about the mortars and capture stuff. I could just roam around America while other players were busy somewhere else and all I did was taking all the burgs over there.
I think you should divide the barracks into early state where you would find most of the early game units and then upgrade them(barracks) as you advance to another age of your empire. Why? Well, I played as UK and there was one unit that always disappeared from the list whenever I was training one of such type.
I could probably think of some more but not now, however - your map is quite good and great to see you asked others for help. Keep up the great job.