I agree that this is something that has to be fixed, but still is not acceptable that if I get d/c i automatically fail the leve.
Actually back in beta it was working this way, everyone complained and Tanaka said that previousely they made it impossible to do again a failed leve because people would get advantage of it (he was right -.-)
I guess they should find a way fix both of this things toghether, though I really have no idea how they could do it.