The reason these maps were pulled was because they were older maps. They were displayed in a way that they showed up okay in the modern terrain system, but underneath (hidden) there was funky interactions with the code taking place.
HTC found that this was why there was so much server instability in the SEA and events using these older terrains. it was the terrain itself. So they binned the old terrains. If/when they ever get re-made with the new terrain system they'll work just fine.
Until then, don't go designing anything off of those old maps. I doubt they're still available on the SEA servers anymore.
