Appreciate getting back to us about this. Don't rush something that you aren't ready to put out, especially during the Kickstarter phase. It's going to be great to see how the game evolves over the next eighteen months.
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The new difficulty settings are definitely named right. I could enjoy the game at a relaxed pace on "Chill", "Un-chill" I got to about speed level 5 again and it all fell apart, and "Oh Jeez, Oh F*ck" was a whirlwind right from the start. (I saw what you did there, with additional spirit symbols with the higher difficulties, too.)
Looks like it'll be fun to watch people play the higher difficulty modes, I think. Even knowing I can swap spirits with empty spaces doesn't help the sides from filling up pretty quickly.