Interesting, I think there is no one answer here. One of my favorite exercises when I teach a mixed class of beginners and folks with a few months experience, is to have uke lead. They move as if the nage is doing it all perfectly and actual nage is to just be along for the ride. I like to use ikkyo for this. Later nage does the technique and as long as nage is doing anything right, uke moves as if it is all right. Much later say 4th kyu up, I like to provide a little resistance to see if nage can find where they can move and have no resistance. Much much later we start talking IP at which I am just a beginner exploring the possibilities. It is all good and all run