I agree with the reviewer on some points; like the item placement and the weaknesses.
The idea of "improving" a map is healthy, although it's very subjective and if you do it you'll end up into very sensitive territory, because you're dealing with a map that's already done and, in this case, it's a very well known map that's even used by top level players.
Other point I agree with the reviewer, is the black sky. It looks way out of place, just does not fit the map. Although, from my point of view, I don't think another skybox would have been better; to me, it should have been built into enclosed space, within walls, no skybox. But it's just my opinion.
Anyways, besides the parts I don't like, it's a very well designed map; of course, I say this from a mapper's point of view. I just don't think that "rebuilding" someone else's map is a good idea, unless such map sucks big time and you can actually improve it a lot.