I am Savagery beyond Comprehention,
Dude I love your map! You really handled how to make it look and feel like the original masterpiece! Although I do have a couple suggestions, (which I wouldn't say except that you have the skills to implement them very easily) that i would love to see added which were my favorite memorys of this map.
1. The Turret
2. The 2 Plasma Rifles (Used to be brute plasma rifles) in the back of the city
3. Add 2 blocks (or whatever you think would suit well) infront of the warthog where they were usable as cover.
An easy way to achieve all of this (and the money required) would be just to erase 3 spawn points and the 2 blocks above the bunker at the end of the street. They are unneeded (although they are accurate) and I'm sure you could find 3 spawn points to dispense of.
Again these are just suggestions and I abosolutely love your map. 10/10