If this is how you define the question, I see it as unproductive for you. SPG sides with its policies, as it should. It appears that you received the benefits you were supposed to receive as GLD. Think of the alternative. I'm currently staying at a LC property in BKK. I was upgraded on checkin consistent with Starwood policy. Now suppose that I throw a hissy fit because I was not upgraded to the RAMA Suite. Am I entitled to anything? Oh, and BTW, I did not find any piles of cash in my room when I arrived, and I'm quite disappointed about that.

Customer service cannot be driven by guest disappointment alone. There must be some injection of reason vis-à-vis published policies, terms and conditions.