A bit of a strange update again.
The most pressing issue with Pentax flashes is the hopelessly outdated P-TTL. Or do the new flashes give you a means to control the light ratio output of slave flashes?
Furthermore, the trend is away from optical ("wireless") communication towards RF communication. More and more flash models will support RF communication with a master controller.
If one goes through the effort of creating new flash models then why miss out on these important points?
I have a feeling the weather-sealing is not the unique selling proposition it appears to be on paper. That leaves the LED light, which may be great if it works well as a modelling light.
In any event, these prices are disheartening, AFAIC. A flash tube and a capacitor, a display, a few buttons and some electronics do not cost that much to produce. I'd rather buy a Metz 58 AF-2 or three cheap flashes with built-in RF receivers and still come away with cash. With the latter I'm losing P-TTL. Did I say lose?