Update:
I received an update from Marriott corporate after directly emailing the CEO. No actual resolution, but I will give them a couple days as they are "investigating". Email below:

"Good afternoon Mr.:

This is to acknowledge your correspondence and thank you for taking the time to contact us regarding Denver North/Westminster SpringHill Suites. Your letter to Mr. Sorenson has been referred to me for a response.

I am very thankful to you for having brought to our attention these areas of opportunities you kindly detailed. It is only through the valuable feedback from loyal customers like you when we realize we may have areas to improve upon, in order to meet, and exceed, our guests’ expectations.

I have contacted the hotel's executive management team for immediate review and response. In the meantime if there is anything else I can do for you, please, don’t hesitate to let me know.

Corporate Liaison, Office of Consumer Affairs Marriott International, Inc. 10400 Fernwood Road Bethesda, MD 20817