Big selling point: We have MOAR maps than the vanilla and also more than PR! Hurrrr!
Anyway, dessert combat is unique, and probably it is an American affectation with their modern combat theatres. Just like you guys said, Normandy, Bulge, and other American theatres are overrepresented in many other games, and maybe those dessert theatres could be a unique selling point for FH2?
Also, I have this impression, that FH2's African maps are much better than other theatre maps. In a way, it is more complex, has more depth, and gave us unique and specific themes. They are really worked to the slightest details. We have sandbox-like El Alamein, Giarabub siege map, Op. Hyacinth night raid, epic CQB in Fall of Tobruk and Sfakia, intricate bunker fights in Sidi Rezegh or Mareth Line... i'll just describe it as "beautiful", they are also feel realistic.