My only guess is that it just happened to begin getting voted for less, possibly because of the addition of new maps, or just by coincidence.
I can assure there was nothing broken about the map. No one disliked it, either. At least, not as much as some other maps that are still in rotation (mannco, dust showdown, egyptyspot, which have major flaws but are still somewhat fun)
My point being, I believe Warehouse should be given another chance. I'd also like to hear what Bottiger's justification is. Thanks!