I was thinking about the Pz IV, with it's relatively weak armor, and it occured to me that based on what I have read in Normandy and Belgium they used to generally ambush American tanks from a hull-down position.
That made me think, it would be really cool (it it's possible) to model some embankments around airfields, which say two or three tanks could drive into and get into hull down positions to aid in airfield defense.
This would also help against rocket attacks and strafing.
As an added note I think it would be cool to put M18 hellcats, and ppossibly even M8 armored cars in the game because they are so fast and could cover ground from one airbase to another much more quickly.
DB