If you are having difficulties with stationary indirect fire units I'd recommend that you and Lemon try out one of my cheese tactics. The synergy between the Osttruppen doctrine and Special operations doctrine is amazing. If you want to see what broken really is use the Artillery flare within their base area and drop rail way artillery on the USF players base.
And there should be a button to spread out squads and infantry, although this may encourage blobbing. But it would probably be for the best
AoEII had different formations for units. I don't see why this couldn't be incorporated into the game.