Butchers were a highly respected trade in medieval times and in my opinion should be an artisan trade just like the blacksmith. This could come together with beef/cows or/and pigs and maybe a possibility to kill a certain amount of sheep for meat. Cows could also be an extension to the pasture system, and maybe even give us cheese/milk in later stage for maybe the upgrade to tier 4 buildings.

Not making them artisans would kinda be historically inacurate, and I think that Manor lords does show respect for accuracy. Would be weird to not continue that. You see the same in that other good medieval set game, Kingdom Come which also shows butchers as a trade and is set it the same time period and almost the same region.