I fail to understand why this seems to be an important issue for many.
The JWs teach that a "church" is NOT a building, but a collection of PEOPLE.
The Watchtower has never claimed that Kingdom Halls (or any other Watchtower property) was permanently special or "sacred."
When a new kingdom hall is opened, I believe (and I could be mistaken) that there is some kind of a dedication ceremony. When a Kingdom Hall is going to be sold, as far as I know there is no un-dedication ceremony.
I think some JWs have an irrational emotional attachment to the property that was, once upon a time, THEIR Kingdom Hall.
Get over it, you silly witnesses of Jah!
That's my opinion, and I'm sticking to it until I don't.