A lot of the changes I added to it were pretty much what you said. Except the natural rocks were kept and I didn't add the extra (second) ramp to the old mains (i did change the direction of the old main ramps at their fronts to horizontal though, like you did, and made them bigger)
btw once i figure it out I'll rename the Barren Wasteland map to Arid Wastes 1v1 xD
Again for my changes you can use Ragnarok Connection and hopefully we can improve it and come up with something good?