I see what you did there.
I can imagine the pain trying to balance those emplacements - too strong and a set of emplacements will counter their own counters, too weak and they won't be worth a thing. Could be a problem in team games with spare resources, but we shall see.
Thing is, they make your army start to camp, bcs they need a defence, unless ofc , the axis is on the back foot .. Still.. we have not seen the Commanders yet