I like it without the sidewalks, i think it looks more realistic, like a slightly under developed city/town)
I agree with Terranova about the ladders (lots of accessible rooftops) and having many different underground basement type area's (ie fools rd / 0.5 al basrah) with caches in them would be fantastic.
*One* non-respawnable apache would be ok (but IMO don't make it respawable, like you said)
IMO you should be careful with the amount of armour you put in there,
just to minimize the tank/apc sniping from long distances and making it just another ejod desert,
would be great to have it as a mostly infantry but with 'limited' armour and asset support.
Maybe even think about having the tanks and/or apc's as non-respawnables.
Someone else mentioned cardboard boxes, rubbish, etc and I'd love to see plenty of that in there (gives a gritty/realistic type feel)
Keep up the good work mate - it's looking great
EDIT--> the mosque area looks a little 'abandoned' with the terrain around it as dirt,
maybe having a paved area around the mosque would be better?
You'd think if they went to all the trouble of building a nice mosque, they'd finish off the area with paving of some sort.
Also with regards to the open area's - would be nice to have quite a lot of those little compounds you were talking about to spice things up, even if they were quite spaced out.
And perhaps have part of one of the main roads blocked with abandoned cars with a wreck of some sort out it front, as if an attack occurred and everyone behind abandoned their cars and ran for their lives.
Just suggestions mate - take em or leave em

There he goes. One of God's own prototypes.
A high-powered mutant of some kind never even considered for mass production.
Too weird to live, and too rare to die.