Just checked in for a one-night stay. My preference in Shanghai is still the Hyatt on the Bund, but since I had friends staying at the Langham Xintiandi, decided to give the Andaz another try (since it is just across the street from the Langham).
As Diamond, I got upgraded again to the Andaz XL King room, which does seem to be the standard upgrade for Diamonds. As before, the "usual" amenities are still missing: no pen, no writing paper, no internet cable for wired access, etc.
The checkin and restaurant staff seemed to have warmed up a lot. They were much more friendly on this occasion.