Originally posted by GunsForBucks:

If you have not been there recently the place is now reportedly empty. This was done in the last patch to prepare for the Mistlands update.

Can absolutely confirm, Mistlands are totally vacant. No spawns, no plants, no nothing but rolling terrain.

Makes a nice quiet place for a house if you want to be left alone, actually. Might want to bring light sources, though. It's twilight at midday.