Some people make "RNGeesus" frown on them. I have Counterattack in my loadout about 1/2 the time. When I see certain behaviors AND lack of a counter, I use it and often get 30-50 kills with it. When it vets quickly, it will fire fast enough that it doesn't seem so random.
Storm doctrine punishes the same type of behavior. I like it better than Counterattack, partially because it is a great vaccine for the Counterattack virus, and partly because it punishes blobs even better. I played on Port of Hamburg against 2 Soviets yesterday who liked to stack mg's, mortars, etc, and then push in with infantry. The LEFH killed 19 models on the first barrage. The stuka dive bomb in the middle of their retreat path kept most of their team weapons from getting back to base. The game was pretty much over after that.
Against better players, B4 probably is just a RNG generator, but good players usually have a counter for it, which makes using it a bad idea anyway.
I was talking about B4 in 1v1s, where most meta doctrines don’t have an off map arty.
In teamgames you can build it in 1 out of 10 games where you don’t face an off map that deletes it, but when you do it is game breaking if you can use it.