So I now have three recent Star Wars tech sources, all tied to Lucasbooks but also from different printing sources and different writers/editors, and guess what; the Millenium Falcon has the exact same deckplan in all three. Go figure! The MF 3-D Owner's Guide by Becker & Mayer, the Ultimate Collection blueprints by DK and the "Haynes" Owner's Workshop Manual all have the same exact layout. Moreover, Haynes actually addresses the scale discrepancies (in a sort of historical retcon), a sore point among modellers, and states the **official** size as 34.37 meters (though the "standard" YT-1300 is listed as 37.75 m) - something folks have long argued for or about.
This also illustrates a new attention to detail among at least LucasArts and, hopefully (since it's now DISNEY) the franchise as a whole. FFG dug as deep as they could to bring us the most accurate miniatures possible for X-Wing, and now we have these sources from 2010-2011. We can only hope and pray the trend will continue.
Ha, I can't WAIT to see the deckplans in the Beginners' Box! I wonder if FFG will have done their research.