Turns out that there will be no XP in Origami King. That's disappointing. Most likely means that battling is still not quite as worthwhile as it was in the older games, but at least attacks don't cost resources. I'll definitely wait to see what reviewers have to say before buying...
This would make me much more likely to buy it. Sticker Star's and Color Splash's level-based world map was incredibly uninteresting to play. It didn't feel like a living world. More like a paper platformer.