Again, very interesting. I thought that Scheiner had done full 5.1 mixes of all the early Steely Dan albums, that simply hadn't yet been approved by the notoriously fussy group (apart from Gaucho). That sounds less likely if three of them have missing multis.
ES definitely completed remixing "Pretzel Logic" into 5.1.
Word was "The Royal Scam" was next in line to be remixed by him into 5.1 for surround SACD but I never heard or read anymore about that beyond what he was doing next.
I'll find the interview in which ES says some multi's for CBAT, Aja & CTE are missing and post the link here.