Being plat, aka former gold, isn't a high priority but your advantage is they don;t have your room type (I'd speculate water damage with several corner kings impacted). I also hate the upgrade games ... like the hotel where I had booked a pool view told me that they didn't have any suite upgrades despite the ones on the website but had "upgraded" to a quiet section at the hotel by the parking garage that listed for $50 less than the room I had booked.

That being said, I'd suggest going back and saying you consider moving to the club floor to be a downgrade from the room you had booked (check size info off website) and you would have access to the club floor as a plat but that as a plat and a repeat guest, could they confirm one of the suite upgrades in advance.

I don't think the guarantee applies here.