That's a bit different, I think. You're describing what I'd call the degree of internal conflict (which is only partially visible to the conscious mind, of course). However it seems that agency is very much tied to propensity to act and that is not a function solely of how much in agreement your "drives" are.

Crudely speaking, agency is the ability to get your ass off the couch and do stuff. Depressed people, for example, have very low agency and I don't think that's because they have a particularly powerful instinct which says "I want to sit here and mope".