I guess that this thread wasn't noticed, because of the other posts.
I aren't a climbing expert, but something I can give for the looks: Use a bit more colourful sky, in many maps of yours there's almost pure grey, which repeatedly makes it to look quite boring. You have used in all these maps only one scenery, and I guess that it's good for climbing maps to have nothing more. But so, think about the opposite colours. Like orange, blue, they would look nice together, as orange in polygons and blue in the sky.
And I do know, that the colours tell about the polygon style. Use the main colour part. If for an example you have mostly deadly polygons, use red ofc but make it slightly into more orange (if we are using the orange-blue example).
I hope that I was clear enough to be understood