Well, the 256 CSets thing probably won't show up for a while, but the possibility will exist.
As for the 16k combos, probably a special key combination would move one "page" at a time (256 combos at once).
Also, the reason that 16,384 combos were chosen over another power of 2 is because there was only room on the screen for 64 selection items (on the combo page select screen). With the need for that gone, I could safely move the max number of usable combos up to 64k. Maybe even tiles, too.
