That's the one, I don't own a Vita (yet) but yeah it would have been cool to finish up a session on the PS3 version, save the game, and then continue in bed or during a break at work or something on the Vita.

Of course that's still attainable, but yeah making it cost extra is a dumb move. Makes sense from a business perspective of course as they'll squeeze more money out of people, but it's still a bad move in my opinion.