(1) the map size has been reduced to 24x24 from 25x25 to fix a freakish glitch where the outside 1x1 of map texture was invisible
(2) The metal concentration has been more than doubled now, so on the patch-ish areas you will extract ~2.5 metal with regular extractors and +8 with Mohos. In the previous versions there was just too little metal.
(3) The gravity has been reduced from 200 to 100 because plasma cannons didn't actually shoot out to their full range.
The map is big, but there are not huge open spaces to build mega-porc bases and such, so spread out a little!
Here are a couple shots of the map as it is now:

A medium-size base

A "checkpoint" of sorts, with a convoy of tanks passing through

A battle on one of the 'bridges'

The same checkpoint from before, but a different perspective and time (notice how these pictures are chronological?)
You can download the map and look at more pictures Here, enjoy!