In a way it's kind off great for them to use the Rotation opportunity to also kick some cards from the core and revive some back from the dead.
However the challenge in my opinion is still trying to get new players on board, given the amount of cards they will still need to collect to keep up.
Also typical to LCG core sets, even the new core still has singles of cards. I think this is a missed opportunity to give any starting a full play set of cards in 1 just in box. I personally have every pack to date including triple cores, and I may have considered getting the new core set , though not practical, if hey I'm getting a full play set of the cards with new artwork.
I think either unless old data cycle packs somehow go down in price or they come up with consolidating past data cycles into one deluxe boxed at a cost-effective price, no matter how many of us like this game, it's going to be intimidating to get new players to jump on board
TCGs on the other hand, regardless of the theme, even though more expensive to 'collect' in the long term, offers an easy buy a starter box deck or 2 and some boosters and off you go...