If you're going to have PSU, MD, and Rutgers in the B1G, then having the BTT in DC or NY occasionally makes sense. Switching the weeks does seem silly but football has five weeks before the bowl games and the scheduling isn't that crazy. And at this point, with all the late or early games to accommodate tv, this doesn't seem so wild.
I understand missing the days of the actual Big Ten before even PSU, but those days are long gone. And I do like being able to watch every single game on tv. I do think they could've played in Brooklyn the year after or something like that.