In some ways, I suspect that whacking Heydrich was of substantial value in furthering partisan efforts throughout Europe.

Setting aside his demonstrable evil, Heydrich was intelligent, pragmatic, and an able administrator. His carrot and stick approach was quite far along in suppressing resistance efforts in Bohemia/Moravia. Had he survived, he had the clout to spread this approach more broadly and to make strides against partisan activities throughout the Nazi occupation zone. This would have diminished the partisan effort and put more German troops into the field.

His death, and the classic SS thug lash out and destroy response, set exactly the kind of tone that appealed to the cunning but less intelligent cadre that was the norm for Nazi leadership and which also ended up furthering the resistance efforts through its very harshness.