The problem is that moving large groups of notes with our fingers is not very precise, and especially in my case because I frequently use notes that land on odd beats or that do not conform to the grid. That means that the moment I move these notes, they will snap to the nearest grid line, messing up my melody timing. And if I turn off the snap option, I would have to tediously position them in the exact way I had them in the lower octave. So you see, being able to select notes and move them up or down with button commands would be a very useful workflow improvement.
