Quick story is I had a reservation for 3 nights that I needed shortened to 2 nights. Doing this at SPG.com caused my rate to increase, so I call SPG Platinum as I have done many times before to ask them to change my dates and keep my original rate. I was told they have been asked to no longer call the front desks at hotels and change reservations.

Obviously Starwood is welcome to create whatever policy they like. I can say as a Platinum 50 member that this ability to change reservations was one of the nice perks. Having that taken away definitely lowers the value of being Platinum for me.