Your changes will lead people to not use ashigaru at all! There is no way they will get loads of YA when samurai units are a better bargain. At least the current system promotes using the hapless peasants. With your scheme, ashigaru will become extinct in MP. Face it: get a low honor ashigaru or samurai? Hmmm... hard choice there. You will thus face al-samurai armies, just as you do now in many MP games. How realistic is that?

I say give the peasants a break...