I've been thinking about this for some time now (alright, right after Gen Con, when FFG announced "Wave 2"). With the announcement of the Millennium Falcon, I've been thinking of the scenario (from Episode V) where the Millennium Falcon flies through the asteroid field, escaping from Hoth. Six asteroids doesn't seem to cut it, and I don't want to buy Core Sets just for the asteroids alone. Also having more asteroids of varying sizes would be a bit more challenging for skirmishes too.
Any thoughts.