See, this is called being retarded.
ML-20, and for that matter, any other static battery counterplay is done through doctrinal picks. You see stuka or il 2 precision in the enemy loadout? Wait before going artillery.
Picking AS has no counterplay for OKW trucks. You are literally forced to not build CORE tech structures in advantageous positions (and if you give me that dumb bullshit about building it in the base, then why does the mech hq have a forward retreat point?).
Placing OKW base buildings on the map is a strategic choice, just like picking Commando Regiment and saving up 320 munis is. In 1 vs 1 you can easily have base structures in HQ vs Brits; in team games you can place trucks on map in a conservative fashion, using AA to protect from recon planes.
It's been established that certain strategic choices can simply invalidate other strategic choices, and in particular choices tied to a commander should generally be the ones doing the invalidating. (WC51 vs Kubel for instance. One example but there's plenty.)
At the expense of not having OP Crocodile, logistic glider, fancy arty, etc, the commando regiment gets nice infantry aggro abilities, insane commandos, and the most expensive off-map ingame that's sole purpose is destruction of static on-map structures.
Imo the ability should leave full hp OKW building at literally 1 HP, so some kind of ground forces have to finish it. But the basic premise is fine.