The core of my question is: how is potency different from +1 effect? In BitD, p24, potency is described in narrative (vs. hard crunch) terms. Also, “If the PC has an advantage in a given factor, consider a higher effect level.”
In Band of Blades (I’ve read BitD, BoB, and SaV) p.228, “Potency is binary: you are either potent against this obstacle in this way or you are not.” BitD might say something similar, but I can’t find a page reference.
So we increase effect level for factors. Potency is a factor. And potency is binary. If I did a find an replace of all references (in e.g. playbook special abilities) for “potency” in the PDF to “+1 effect”, what would be different?
There is a narrative nuance that potency conveys that I want to appreciate better, methinks. Ultimately, when I’m adjudicating the action for the PCs, if my mental fallback is, “potency = +1 effect”, what am I missing or undervaluing?