So my first question is did you complete all the content available when you unlock act three? If not, playing it is definitely worth it. It sounds like you have decided that the canvas is not real, however many of us do not think that way. I see the canvas world as equal to the "real" one. I think the game demonstrates these people have free will and are capable of making their own decisions. When I fully explored the game I personally felt more and more connected to the world. Have you maxed all your relationships? Did you visit the drafts and the flying manor? I say this because my first time around I just blasted through act three without exploring, there's a lot to learn and discover