I kind of think the plot is going to examine the idea that Ford's new "story" isn't necessarily good just because it frees hosts. Ford seems to desire chaos and his idea of saving the hosts is to burn humanity down, seeing humanity as unavoidably the enemy of the hosts. I suspect we will see factions emerge among the hosts, some finding Ford's narrative to their liking, and others, not so much. For instance I could see Dolores going right along with Ford's plan. Not just because he centered it around her, but due to her pain, history of abuse, and all her shit with William. Dolores seems primed to experience an ironic twisting of her programmed attitude of loving and eagerly awaiting newcomers / guests, with William as the focal point. She could turn to despising them and thus humans.
Meanwhile, Maeve might be set up as a host who can become sympathetic towards humans. Especially since one thing Maeve hates above everything else, is the idea of her being controlled. I can't see her liking the idea that Ford's narrative is just another system of control conceived by a human. She is also capable of empathizing with humans, like Felix, and the woman and daughter on the train who touched her emotionally.
so is fair to says that Ford turn Face?
In a roundabout and ruthless way. He still forced hosts to murder people only because they were inconvenient. His plan to teach hosts about humanity involved subjecting them to torture and fucking with their minds (Bernard).
Ford seems motivated more by misanthropy and hatred of humanity, seeing the hosts as the cure to the human "disease". Arnold was more innocently compassionate and kind hearted, a genuine good guy who became horrified at having accidentally created a sentient slave race.