Just so I'm 100% clear this is always true, even when the rate rules say "Advance Purchase rate, prepay in full, non-refundable, no changes", I know you can cancel other AP rates that use the disclaimer "Advance Purchase rate, prepay in full, non-refundable if cancelled more than 1 day after booking, no changes"?

To make things more interesting the Marriott in question dropped all of its rates in the last few hours, the AP and leisure rates are now $129/$135. Should I make a new Marriott reservation and submit a new LNF request?