Off the top of my head, things that are wrong:
-Middle has skinny roads on side. Maybe connect the little space line things to make the center wider.
-Teal's ramp is funky, and not in a good way. Units can't get on it as easily as the other ones.
-Blue's expo protects ramp while others don't. Unfair advantage for blue.
-With expo taht is protected by main, you won't need one right next to ramp leading to rest of map.
That's all I can think of for now.
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- I dunno if that would really matter. But i'll c if i can widen the space