Your Proposal doesn’t adress the problem of infinete ressources of all types at all.
It makes it even worse in the long run as your garrisoned vills give 50 % more ressources (or even 100 % i terms of pop efficiency). At the same time the eco is as well protected against hussar raids as it is currently which is the next problem with feitorias, their insane raid protection.
Several Months ago I made a different proposal here, adressing some of the major issues with the current feitoria design: