If Paizo wants to play it safe, they could try re-releasing/ revising Class Decks instead. I don’t think it’s a surprise to anyone that the original batch of class decks were super outdated, even before the new design was rolled out (Mystic Theurge in Cleric is particularly bad, due to lack of Arcane stuff to use) But now they are even more so. So do those instead. It lets the devs update old class decks, lets players have their sets updated to the new format, and lets everyone see how they feel about redoing old content without a heavy investment.
Hopefully it would be released with more than just format updates, and actual modifications to the cards to fit with new stuff, like how spells tend to have additional effects now (See: Immolate from last weeks article), or even just outright replacements of a few cards.
Class decks are small, so it’s a bit safer to experiment with them for re-releases. And if it is successful, you could make a show out of releasing the old content. Look at the 10th Anniversary of RotR book, which appeared to be a huge success, or the current Kingmaker campaign. Update the faces of the cards, revise any text needed, throw in a surprise change or two, and toss the whole thing in a mono-color box with gilded text and people will eat that up.
But until then, class decks are a safe option.
