Really nice mod. Only counter is the base game itself that makes cheap units really worth it, since almost every upgrade or buff is the same for every unit. Eg: Armory, stand and fight, chevrons of experience, standin on a wall buffs, charge bonus apliying only to the first row... so yari ashigaru are dirty cheap, expendable, easy to recruit, yari wall is op, they melt cav, high in numbers, easier replenisment, etc.

So I was used to global upgrades mod, that doesn´t work together with this one.

Yes, this is how my other two reworks for the other campaigns work.
It's part of an ongoing endeavor to get rid of how ashigaru spam is the be-all-end-all tactic to use.
By making is so that farms grant fewer ashigaru the larger they get, you have to make a choice between having small towns and lots of peasants, or large towns needing a professional army.

I believe if you want to spam ashigaru you need to demolish all farms to level 1. Is this feature intended?