From what I've seen, I've come to conclude 3 things:
Firstly, it's surrounded by mountains, making SAM sites a virtual useless
Secondly, Even if it wasn't in the mountains, there's not much strategically there.
Thirdly, Iran does not rely as heavily on SAMs for protection like Iraq did in the Gulf War. They saw how ineffective they were against the coalition. It appears that through a respectable network of early warning radar as well as soon to be implemented over the horizon radar systems, they plan on doing aerial interdiction rather than playing defense.
This actually explains the many gaps in air defense along the southern portion of Iran.
The north is where most of the SAMs are concentrated. Tehran has 12 SAM sites to cover the city. Isfahan has 5. There is also a nuke facility between the two with several 2K12 batteries protecting it. It's a shame the map won't be expanded that far north though. Doing a refuel in, refuel out strategic strike in Tehran would be awesome.:pilotfly: