Lydias, are we meant to discuss ideas here as well or just put them up? If not, please delete this post and uzziah's.
uzziah, I'm suggesting this in combination with no NW based time penalty in war. And since barracks now have an economic bonus (that also matches barracks well, helping you recover losses), you can just run higher barracks if you want good attack time. Without compromising your province.
I disagree with your armoury proposal because I don't like them being a pumping building. I'd like to see them be more useful in war. And theme reasons too, I like the idea of barracks helping you recruit soldiers and armouries maintaining a well equipped army.