I`ve played this mod with the English and with the Irish.
English :When you have recruited a few troops, you fight against the Sherwood men to make them level and get a cavalry army.
Once you have 40+ English horseman the game is over you can destroy almost everything on the map ( Except siege ).
So i would say that the English are currently very strong and are easy to play. Their Knight should be a little weaker than the French one but still , i liked what i see.
Irish :Irish troops are "normal". Not too strong , not too weak. The problem is when you meet an English army, you are dead. The enemy cavalry is going to bring you down if you cant stop them. But to stop them you need a strong infantry line.. which in all the case, you wont have. So you have to rely more on your companion .. send them charge the enemy cavalry when they are close... you sacrifice them for saving your infantry.. but still you have to defeat the main foot army who is stronger than yours.
I guess the mod is not finish yet, but i hope it was not mean to be balanced.
BTW i really enjoy the Irish vs Scottish. But the English are just a little too strong to be enjoyable
Great Mod so far

Edit : Some sword are doing "piercing" damage... and im not talking about when you thrust , but when you slash. Maybe its for that reason that the english army is so strong.
Edit 2 : I do not know how you plan to make the "british army" party spwan in the next version but i killed like 10-12 party of them and they still respawn really fast !