You mean to tell me a clone of the German GranatWerfer 34 would break the balance more than the 115 range double mortar pit? You've got to be kidding me, you are aware that mobile mortar crews die like flies to anything that touches them, right?
Like fucking seriously ask any Wehr, Soviet or now USF player on how easy mortar crews die.
No sorry I'm not going to take you seriously on this one, I'm done.
mortars (and artillery) in general get accuracy bonus firing at sighted target. (technically it's a penalty firing into FOW).
scout units are generally fragile and specialized. Most of the time, artillery support is either barraging inaccurately into FOW or when your own troops is in a firefight.
the british get sight bonus upgrade on its line infantry and medium tank. this make it easier for british to get sight without risk of return fire or needing to get specialized unit.
British with mobile mortar can basically creep their way without coming under fire.
and I've always said that that autofire range on the mortar emplacement need a nerf. I've already suggested in the somewhat old thread I posted