I suggest to make the area towards third tech stuf /texturewise, probably even a bridge, beautify the bases with some diversity in textures and doodads and you have a nice little (4)map ready for testing.
I would like to see more space on the third's highrounds though. also the pathes towards them are a bit long. probably you could move them a bit clockwise - which also legitimates the DRs here - and there fore make the pathes (counterclockwise towards thirds) a bit shorter and give a more spaceious area infront of third on the other side.
like the bones and the cartoonishness of their scale. cool stuff here!