I filled out that survey too.
When I download the stems individually, I prefer to have them panned to the right with the click panned to the left. It makes it easier to chop them up in Ableton if I want to customize intros or outros especially. The stems are then exported to mono mp3s for use in ST3.
I'm guessing that the way I like my raw stems won't be an option if/when they implement multitrack downloading. I can hope though.