If you have a style indicating a few basic tenets, where "ki-ryoku" seriously only referred to "spirit", then you would have essentially a dumb style, so to speak, and they weren't dumb. Martially I'm sure every sword style had their own approaches to functional ki usages and by elimination, I'm betting the "ki-ryoku" covered that aspect.
Of course, I could be wrong. But I'll stand on my bet.
At a certain level we are just talking about terms so no harm, but I am wondering if you take functional ki uses/ki power as subsumed under "ki-ryokyu" what then would "kokyu-ryokyu" signify as we have been discussing to this point?