This is a good ruling that strengthens the vertical separation of power (long-forgotten in favor of touting horizontal separation as though it were the only one). However, let's don't get too excited. This ruling could be very narrow in effect.
To gain standing, must one be convicted of a federal crime, in lieu of a State offense? This ruling says that such would result in standing to raise a 10A question that must be considered. But can a citizen get standing to sue under the 10A if they have not been arrested and charged with a federal crime. Suffering the arrest and trial is not an outcome I would seek just to gain standing!