I haven't Planescape: Torment before, how much agency did you have and how interactive was the world/narrative? I backed the kickstarter for this but I had pretty much zero idea how the game would play.
As much agency as was needed to make it feel like you were role playing but still with a strong writer's hand backing the whole thing. Planescape loves to give out choices that only matter to you or a few other characters since its an intensely personal tale. You will not change the multiverse in Planescape. But maybe you will in Numenera. The "what does one life matter" line could certainly be interpreted that way. But probably not.