Alright, just ran through the map. I'll have to say, yea, the map is overscaled.Vertically it is very very overscaled. Distance between points and size/width of wards is also overscaled but not as drastically as it is vertically.
2/4 (the choke I was mentioning) will very much so be a choke, you have it in a pit (a very oddly shaped one too, the mounds around it don't need to be so abrupt), which will lead to a LOT of spam. that tied with the geometry of the map, you will find it to be VERY spammy and chokey.
For 1/5 you have that down hill (which, is a nice use, but too verical of a drop) with the hydro prop and you have that whole back area clipped off, I suggest you put up some walls there or something to show that people can not go back there. Leaving the clipping un-marked will completely screw up people.
You also have a lot of props breaking up sightlines and just placed randomly in the middle of rooms, although this seems like an easy and natural thing to do, it just leads to prop spam (which you have done in just about every part of your map, minus the mid, which is just waaaaaay too tall.
You're environmental lighting seems really dark, if you copy/pasted from a valve map, I suggest you add some exterior lights. If you didn't copy/paste from a valve map, I suggest you work on the environmental lighting.
Also, I know you said you don't want to hear detailing stuff, but chuck the orange texture. Use the Reflectivity textures instead.
Sorry, thats a lot to read, but I hope that this is helpful feedback for you.