So i played it. I must say that i really did enjoy it, there's not much to look at from the graphical side, but the gameplay was awesome.
There's one thing in where you could heavily improve, slopes. The map was basically flat, but if you just play it and not rate it, you won't really see it, because you did a rather good job hiding it with cliffs and buildings, but the lack of slopes took the most points down.
Overall lighting was great, although you could of have done a better job with lightposts, make them more visible, place more perhaps, give your map attitude

. This didn't drag my opinion down but didn't really earn you more points.
I noticed a small bug, if it is. I see you have placed a destroyable cliff at the back of that abandoned Nod base, but theres no way you can get near it with amphibious or hover vehicles, since the bridge was too narrow to pass and on the other side the cliff was a bit too near to the border, so the only way GDI could get there is by Carry-all's, Nod however, had no trouble getting there.
As i said ealrier the gameplay was awesome, i have never seen the AI actually attack from all 4 sides. In the beginning, they only attacked from the 2 nearest sides, wich was pretty cool, but i was amased when they sneaked to the furthest entrance and actually invaded from there, harassing my harvesters. There were various entrances and strategical opportunities to attack the enemy's base, wich makes the gameplay even more amusing.
I really liked those abandoned bases, i usually play with TechLevel 9 and those were very important buildings at that level. Although the AI doesn't know it and i could practically leave them undefended, but those could be key structures in an online match.
I would recommend leaving atleast 1 bridge undestroyed in the beginning, because i was thinking why the enemy never attacked and was forced to turtle. Wich was kinda silly since i didn't realise it until we both had so great defenses, that i didn't even finish the match.
One little thing, the blue lightposts at the top-left corner have to be toned down, it's great that you made that city special but the only thing special about that was that i never looked there since it looked nasty.
Well seems that the map's future is in my opinion, "To spotlight, or not to spotlight!"
I'll say...Spotlight!