Given the excellent reviews on the MoFi albums, the experts involved, and the astronomical bit rate now possible, I would say that gerryah930 is likely correct that "the digital masters probably sound better than the aged tapes." Even though I don't own any MoFi albums, I have no doubt they sound fantastic, and as they say, "It's hard to argue with results."
In general, my preference is for clean original copies, as they were likely all analog (depending on the era) and produced when the tapes were in the best possible shape. In the case of Thriller, which is cited in the article, a NM original can be had for less than $30, maybe even less than $20. Given how good my copy sounds (which cost less than $5 more than 20 years ago), it's hard to believe it could be significantly improved on. So the justification for the price of a one-step reissue isn't clear (at least not to me).