Heydrich was a very effective administrator, certainly totally willing to break eggs, but more so, efficient in bringing the conquered territories into willing discipline. Interesting guy. The Brits figured him to be very extraordinarily dangerous (Czech industrial capacity very important in those days). My opinion is not fully formed, but this could be. Maybe Lidice was worth it.
Good work on this one, your point of view on the Crete affair interesting and useful, clear and to the point.