Concept wise it looks very interesting, I'm really not sure what else it would need.
I'm not going to say add textures or doodads because I know what you showed is just a basic blueprint.
The borders of the map are usually the lowest elevation level, if its space you leave it like that, if its a jungle tile set you add some trees and/or ruins/rocks or a mix of those, maybe water if you want. And if its a urban tile set you can place some buildings like the Korhal buildings.
To upload go to File>Publish, log on to your Bnet account and publish the map under the Locked option.
Try to finish the map up more and show it with the main bases as well, maybe it will give us some more ideas.
Well, as you look at the map, I think the best place to put the the mains and expansions should be the North and South positions, that will make the rush distance by ground kind of long but it will favor more air play and drops which isn't always bad.
I was kind of thinking that muta harass on a map like that would be brutal, however it would help counter a terran that tries to turtle up in the center.
The problem with the new updated map is that, if you have close spawn positions, which has an 80% probability to happen, then you can probably just ignore the center of the map and try to do a 1 base or 2 base all in since it will be very close by ground. If the main is on top of the cliffs in the corners and the natural is at the base of the cliff then you'll have a very, very wide open natural.
It would be way better if you place the starting positions at the North, South and West, East positions, that way even if the natural is open the rush distance is still long enough that you can react.
I think the bases will be better of to the sides because people would be more encouraged to go trough the center and even if they decide to go trough the sides the rush distance will still be quite long.