I think the abandoned base should be adjusted. At the moment the setup is this:
WC3ScrnShot_092614_180745_01.jpg 134.23KB 1 downloads
With this setup the repair bot on the left doesn't reach and the 3rd wall from the left only gets 1 repair bot and 3 repair units to repair it. With it having the most surface to the outside it makes this a big weak point in this base.
WC3ScrnShot_092614_182654_02 fix.jpg 166.53KB 0 downloads
Something like this. At the moment I cant build a wall becuase it is blocked by the high wall. I think it would be better to drop the high wall on the right down one so that it can be a even line. The right wall shouldn't really need that many repairs because it would only have 1 space exposed to the outside and it would allow all the repair units to be moved to the right so that all the repair bots can repair.