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From looking at the screens I'd say you pretty much nailed it. You stayed true to the visual style and added the extra detail needed to fill the parts that looked a bit empty.The only thing that stands out now, that the rest is pretty much perfect in my eyes, is the shape of the outside-base. It looks really monumental with interesting shapes everywhere but the skyline of the bases, probably the strongest visual in the map, is this rather boring trapezium-shape. You can even see the texture repeating in stripes. Maybe if you repeat the shapes of the middle part or the rounded top part for the side? It just looks very static and boring compared to pretty much all the architecture around it:
