After the halloween event I noticed it wasn't just this one that took a hit. Goldrush Chicago + was like perpetually full prior to the event and now it actually empties out from time to time, which I've never seen.

+1 though if Badwater 2 is always empty. Switching it up won't do much damage to an empty server.
 
Badwater 2 used to be full most of the time. I think there are a few factors causing it to be empty.
1. It no longer has Chicago in the title. like Mittens said.
2. It is now a 32 slot server... eww not anymore
3. I think there has been a decline on ALL the servers because Halo 4 and whatever the other sequel that just came out. People are playing other games right now.