I was wondering this as well, considering that RAM was engineered with a no-compromise and loving approach to recording, mixing, and mastering.

Bob Ludwig, the original mastering engineer, is about as close to an elder-master as you can get. It’s not like there’s any question around his capabilities.

The only “upgrade” that I can observe to the mixes is that the original album has now received alternative Atmos mixes as an add-on.

I think “remastered” is just marketing shorthand in this case.