You are the man. You gave me the best total war experience I have ever had with LME and now you are doing an excellent job with Shogun 2.
I am talking about the headwear of the shogun guard. They should have the same as the lancers.
A few other things:
1. You could make the shinsengumi even better at melee. I mean, there were many very capable swordsmen in their ranks
2. Regarding the guard units, I think they should be just as good or even better at melee than any marines. These were ex-samurai. Giving them back their swords may even be historical (I am not sure on this one)
3.It may be a good idea to allow all ranks to fire in all firearm units. I find it silly seeing line infantry where only the first lines fires at the start of the game. Kneel fire would still have a use since it makes them fire much better.
Also, this allows both rows to fire while on the walls
4. I am curious about the rifle that the shogun infantry have. Which one is it? Why is their range so short?