I received definitive word from Yamaha's software department that there are not going to be any more Power Styles. They mentioned, to my surprise, that these styles were made by an outside contractor. I asked Yamaha for contact information but they haven't provided this to me.

Yamaha recommended that I purchase Midi Spot styles. These are pretty good, but definitely amateur compared to Power Styles and internal styles.

What a disappointment.

Beakybird