I want the lesser evil of freeing some slaves, than none of the slaves, and for Mathilde to not run away and leave people to die or suffer a fate worse than death, just because its more convenient for her emotions, and for her to get over the What measure is a non-human trope, plus ignorance is bliss way of thinking and face her problems in life than pretend they don't exist.
This is Warhammer, if you can't pretend some problems don't exist you would be in an insane asylum or the service of the Ruinous powers.