I would certainly call the location a business location. However, if you can get a good price on the weekend it is also viable for leisure travelers who can use the quick train connection to get to the sights and sounds of Copenhagen.
The non-upgrade upgrade statement has happened to me many times at hotels. Just be happy they didn't try to sell a downgrade as an upgrade!
How did you enjoy the hotel itself? I have not been since opening. It would be interesting to hear if they have ironed out the initial issues they had.