You've never climbed Last Temptation?
I do training like that. For climbing the nose, I did a part of the girdle traverse with a haul bag. I went to some cliff to work out different kind of diedral, I did the pine tree eliminate crack and the two other on the right of them to practice off with. I work out my technique.
I most say that when you are unsure of a move, that you can fall on your pro, that you decide what you are going to make as a move without knowing what you are going to find on the other side...it is pretty fun to feel that you have enough training under your belt to stay on the cliff.
I remember climbing fastest gun at poko, on sighting all the pitches, and after I decide how to make a crux and did the moved, found myself caught in the real crux because I did a mistake and making a layback with a hand jam in a roof to a safe place to get out of the problem. It is different than knowing the move to do and making a routine to climb to the top. Not saying which one is more fun, butfor me it is the unknow and how my progress in technique that I like.