This is the typical food thread. Diners in MDR note the decline. Diners in suites say it isn't so because they ordered an MDR item while in Luminae.
I would suppose that those sailing in suites, if they had to order exclusively off of the MDR menu and dine exclusively in the MDR might have been more in line with the MDR diners' reviews.
Diners in Luminae get to cherry pick the menu.