Back before microcomputers were available/affordable, I played a very complex board game from Avalon Hill called Squad Leader, which depicted tactical-level WWII combat, complete with every weapon imaginable. Artillery pieces were common, but one of the most feared was the German "88LL" - an 88mm gun that was lethally accurate at long range (hence the "LL" notation). It got me to thinking that such a concept could be applied to the equivalent of a Big Bertha. That gun would lob shells into the enemy camp but there was never a way to increase its accuracy. Perhaps PA could include a Big Bertha LL? Either as a separate unit or via weapon upgrades? Or even augmented by a separate targeting unit. Another thought was HE (high explosive) vs. AP (armor piercing) shells... HE would be building busters and area effect, whereas AP would slice through armor like butter, but more concentrated in its damage radius. Just food for thought.