As for other’s slaughtering your animals. We have monsters upstairs in the store you can set to group only. So you could setup kind guard dogs that will attack anyone but your own group members around your farm stock if you wanted.
But yes I think if we increase cxp from field work or increase seed return, and give cxp to farmers when slaughtering their own animals, we may find a suitable balance where giving the mundane pottery, basketweaving style jobs to an even lower class such as a peasant, it would work itself out.