So I am wrestling with a quandary. I have additional character bits that flesh out players from backgrounds with starting skills and potential "career relationships" to faults and favors which allow players to pick advantages (ambidextrous) or disadvantages (Missing hand). This further makes characters unique, adds options for players and in general adds more fun. I always think of character building like laying bricks, you are making something. So while I feel HOW gives you some mortar and a basic start, I think these additional sections really add creativity and individuality.
I've been holding these back for Blades & Black Magic, I am considering adding some of these in the first couple issues of the Cauldron, then expanding them, combining them and adding them into B&BM.