Hi so the major problem with this map, if I can call it a problem, why high rated players won't probably play this map is the design that is not in favor of intresting gameplay.
Intresting gameplay can be usually seen in open maps with expansions, possiblity to raid and at least several choke points.
Now if we look at your map, starting with starting positions, they are all on the same place. That's is not necessary a bad thing, but it also removed one option of raiding, as the main bases are just too well defended. It works on maps like Hilly, but rest of that maps is very open and forces all players to expand/raid, fight for map control.
I guess the bigger problem of your map is that it's a single choke point map, all fighting will happen in the middle of the map with no option of raiding or very limited options of getting an advantage elsewhere.
Also all the mexes you can take on your way to the middle are safe.
Then whoever wins the middle will get a huge advantage.
Not only you have now 2 main ways of getting to the base, you can also access the mountain, kill every mex on it and then use arty or mml to kill the bases as well.
If we look at the hill, it's design is also not the best, I haven't tried it but it seems that you can't really drop the mexes as there's probably not enough space for transports. And then the previous problem of where you can access it from.
There are two expansions in those crystal craters, but the only way of getting there is via a transport, so I don't expect much raiding there once you force your oppenent off it. Having it move open would help.
I also find the textures there quite hard to look at, but some other ppl might like it.
I think there's too much reclaim in them.
The last thing to mention is that even the flat areas are too hilly, example:
You won't be bale to place too many building there and units will have problems firing at each other.