I spoke to one of the Front Desk agents a year ago and she was very evasive when I enquired about the hotel policy on upgrading Platinums to suites; and she did mutter something like they dont upgrade Platinums anymore.
There were also a few reports then from other FT members who didnt get a suite upgrade which led me to the conclusion that they no longer upgrade Platinums. From the posts above it appears that I was wrong.
I do find the suites there to be very comfortable and its a big step up from their regular rooms though view from the suites are somewhat restricted.
However, I am not impressed with their Executive Lounge.