I think this Iran situation will serve as a lesson for militaries around the world that military command and control should be flexible, resilient, and above all, formable by adhoc units when needed.
C&C has to be delegated and lower units should be trained more and, most importantly, equipped with equipment that can flatten command structure and quickly integrate various units when needed
Situation where upper/middle military command is taken out and then C&C and warfighting potential is so diminished is a big vulnerability