I'd Gladly contribute to this thread.
I started playing MM in August '11, and I've played all classes since then. Since November '11, I've been in a Cavalry Regiment, So I have a fair deal of experience within the area, Both as Cavalry Vs Infantry and Vice Versa. The Following are my thoughts on Infantry - Cavalry Balance in this DLC.
As some of you might know, Cavalry was stronger back in MM. In MM, It was a challenge for a infantryman to take down a Cavalier, if we were to discount any eventual player skill. Cavalry were, in my opinion, to a large part perfectly balanced in MM. They were Easy to Counter, albeit not destroy, yet if you made a misstake, the Cavaliers would punish you. This goes for both Linebattles and Public play.
Then Came NW, and some Various Improvements/Nerfs for many classes.
Today it is almost impossible to kill aware infantry as Sword-Cav, Especially Hussars, Mainly because Bayonets can hit faster then a Hussar ( Which have the fastest horse ) can get into striking range. This means that a lone infantryman, with his high spinning speed, can easily fight off 2-3 Sword Cavalry. Also, this is only in Melee, and the Infantry player also have the option to shoot. I Think the Bayonet is to fast as it is now, Weighing 5 times the weight of a 1796 Light Cavalry Sabre, yet it strikes faster.
This seems to lead to a heavy usage of Dragoons in Public play. Understandable, as Lancers & Dragoons are the few classes that can fight Infantry in fair fights, albeit lancers have a very short window where they can reach the bayonet, yet cant be reached in return, and this almost always require banking. Suffice to say, I'm Actually Happy with Lancers as they are now.
What I Find most annoying, however, is how easy this DLC has made combat. It has little room for a learning tree. What I find represents this the most is Dragoons, firing from horseback. To many times have I Seen players I know are very good Cavaliers, fall to a Dragoon riding up, pointblanking the horse, retreats to reload and then comes back to fire on the dismounted. If this is done with a musketoon, there is almost no counter to it.