Awesome.
One, BW failure should hurt. It needs to have teeth and move you away from your Beliefs or it doesn’t matter. What it shouldn’t do is stymie the game. It can leave avenues open but make them harder, or it can close off one and open another, but failure should never be a wall. One thing I stole from *World games is the rough idea of soft and hard moves. Not all failures should be catastrophic, and I tend to escalate the consequences in response to either a lot of failures or a situation that really seems do or die. Titrate the failure to the situation. And if failure just doesn’t matter, don’t roll; Say Yes.
Two, Ob 6 is impossible for all but the most X. Ob 6 Forte is going to be impossible for any but the most conditioned and tough Men, and it’s going to be damn hard for them. The Ob 1-3 is really where most things should fall, and Ob 3 is hard. Ob 6 is heroic and the stuff of stories.