i really like the way it looks now, it looks leaner possibly because of the texture change that gives the terrain more direction.
i am unsure about the new ramps at the natural, but why not try it. along this change i added some more cliffs and connected it to the forward third.
this might be an intersting addition to your change. i also darkened the textures on lowground next to the nat ramp to signify the low terrain there:

another option could be making nat on low, main on mid and use heighground to help overlords spy into the main and create some more interesting structure around the main, when one goes into the tech cliff direction.
i do not have an imagfe of such a change, but i guess this is clear.
while your maps looks good, the mar sara look might be a bit bland. i thought the lowground looks a bit like a swamp > martin could help make it really swampy. i'd love to see that like in monsoon, but greener. or ask johannes to make is a
swampy valley poisened by the tech structures (your mains). could go into this direction:
