I have made some "blueprints" with paint what they COULD update. I am not saying that they must do it, but if they want to restore in the map into their old glory or whatever like that, this could help them in my opinion. Every picture has some explanation in the bottom to make sure you understand it, however it is different from map to map since I didn't remember the colors and I was lazy to use the same. I am not making the maps or updating it. But if some people use this, I will explain the changes.
Al-Basrah V2

To make the map more fun and playable in my opinion I wanted to see a more defend-able city and village. This means that I would like to see more non-destroy able buildings in the village, basements for the caches, some small ditches and trenches for cover, tunnels for save routes and resupply routes like many insurgents faction used in Iraq (search on g00gle they know how to shovel).
Besides that I wanted extra buildings, villages and a road that allows more cache locations, more ambush positions and more cover. It will increase the play-ability of the map and it will use more ground since lots of ground are almost never used.
As an example the village in A10. It is mainly there for some ambushes since the road there is extremely valuable for armored vehicles. Now it is only used to travel and there is no way you can ambush up there, the road and villages make it way more "play-able" which means that you use more space the map offers.
I also chose to have more height differences in the desert where you can see the orange squares. This so the BLUFOR has more cover for their FOBs, and so you can have some firefights their without suicide attacks. It also allows the insurgents to ambush the much used armor the BLUFOR has on this map.
Karbala V2

This map needs a huge overhaul to make it fun and play-able for both sides. The current map is only fun for the BLUFOR CAS and armor on average rounds. The changes I chose for will turn sides and make it way more fun for the infantry to have some hard fights. We need a feeling that the city is one big fortress in the Insurgents favor, but to prevent the map of being lop-sided I chose to only fortify 3/4 of the city instead of 4/4.
We'll start at the red squares. These house are shot down / blown up and some of the houses in these squares are still standing. The houses are there for more cover, ambush positions, cache locations (not the one near the US main) and to make sure more of the map is used (no more bold sand spaces!). The houses in A11/A12 will make the fight harder near the factory area (which needs also a update) and will allow the insurgents to have more air cover to some degree.
The blue squares mean lots of extra cover, especially for the B4/5 Compound and the extra buildings added to it. The mosque will get a market in it to have more cover for caches. The mosque itself will also be enter-able and a tunnel behind the building will allow you to move to the next house blocks.
The factory area in I9 has an update to give a more Iraqi factory feeling and also to prevent 1337 armor rape from the south. Trash piles and shipping containers will give more cover and some close quarter fights for the infantry.
The oases will allow more growth to be put around it and it will same a small village focused around the oasis. This also to use more of the map.
Now the school building, this will be changed in a fortress. You will have small shooting holes in wall if possible, trenches and foxholes around it and a tunnel going to the village west of it. This village will be updated with 2 extra lines of houses with an alleyway between. So you have more cover from the air. The house block near the bridge will allow you to have more cover and cache locations.
Korengal V2

This map will be hardcore fighting every minute for every inch or centimeter. A major overhaul and a extended valley will allow more space for FOBs, space to use air-asset such as an Hellfire Kiowa and a Black Hawk. Of course this is still a huge question but the idea is very awesome in my opinion just like the ideas above.
To safe some work to re-scape all the hills I want to suggest tracks alongside the mountains to allow some more foot patrols.
I haven't told you everything about it, but it are just some ideas I put together. If you have any questions ask them.