It would for me.... If I could sail a Friday to Saturday night cruise to nowhere on the Magic or the Wonder out of PC I'd gladly make that a fun weekend adventure! But, I live pretty close to the port. Or a Sunday-Monday sailing over a holiday 3 day weekend. We also rarely get off the boat on 3 night itineraries except maybe for CC...
They may want to go that route as a way to maintain pricing - Disney has been known to do so before.... For example, they just reduced
DVC add on points from 50 to 25 at all resorts... a few years ago they lowered DVC initial buy in from 150 points to 100...