If they aren't assigning any more seats, there's not much you can do right now. They always hold back ~20% of the seats for the airport to assign, so as long as you check in reasonably early you should be able to get something that's not too bad. There's not much difference between the seats, except for the spacing near the front of the cabin. Chances of an upgrade on a Q fare are almost negligible, even for Superelites ... it's a waste of time asking and will only get the agent mad at you.