When I went to the web site:
(http://www.Marriottrewards.com/Elite/platinum.asp)

It states:
When you check in, we'll upgrade you to our finest available accommodations - whenever we can - at no additional charge. Not available at Marriott Vacation Club International Locations.

*These benefits vary by brand and by level of brand participation. Refer to terms and conditions for more detailed information. "

If you go to terms and conditions, it does not say "Renaissance", Level 6/7 hawaii resorts, or anything else that would exempt this property.

Terms and Conditions

6.Room Upgrade: Upgraded accommodations at no additional charge. Based on room availability
and limited to a member's personal guestroom. Not available at Marriott Vacation Club International or Horizons by Marriott Vacation Club.

Check the web site. No exclusions. I would be happier if you can show me an *