Great trip report!

I also had a one-night stay at the ROS in April on a similar rate (~$100), and as a Platinum was given a Tower Deluxe room rather than a junior suite. I didn't bother to ask for a suite since it didn't seem worthwhile for the short stay. The room was okay but tired looking. Your junior suite looks much nicer. Basically, my take-home message from the stay was that I probably would not choose the ROS for future BKK trips. It seems sort of self-defeating for the hotel to do this, unless they thought that their published rates were too inexpensive to warrant a suite upgrade?