Good work over, it looks nice and the layout is simple but interesting, a few things I'd change however to bring this from good to great.

Firstly because of how easy the 3rd is to get, it should be obstructed by destructible rocks or be a half-base to make it difficult for a protoss or terran to get a super fast 3rd, zerg can already take their 3rd at the slightly riskier 4th similar to most maps.

And secondly the LoS blocker, I think it would work a lot better if you stretched it out to the two smaller corridors and removed it around the xel naga. This way you are safer from obvious middle-map attacks with the xelnaga, but more susceptible to flanking and harass attacks around the sides.

Other then that I really like this map, I had doubts about the cliff between the 3rd and 5th base but then realised this would make for some very interesting use of muta, medivac, colossus, siege and even reaper harass and harass defense, so good job on that.

Looking forward to trying it out!