Blades of Passion......Flatt is known for building through the season and IIRC, had a downgrade or two at the club events. 3Lz-3Lp IS her 3/3 combo this season (great ones in both the SP and LP warm up from info shared by Drew and gang).
With respect to "Drew and gang", I think they are wrong and I will believe when I see it. I doubt they were paying attention to underrotations. Flatt has never done what I would describe as a "great 3-3" in her life, so I highly doubt she will suddenly have a 3Lutz-3Loop (much less a great one) if she could barely do the 3Flip-3Toe in the past.