All you experts out there telling Frank what to do! He is a hell of a lot smarter than any of us, besides it is his company, let the man do as he pleases. Start your own helicopter company if you want a certain design.
I myself think that it will be a damn good machine going off his last two attempts. I also guestimate that it may be powered by the new Lycoming IO-580-B1A, until his deisel gets certifed. I am also thinking maybe a six seater, as you would not design a whole new helicopter design for only one seat.
A wider R44 design called the R88.
It all comes down to cost and weight. Turbines may make too expensive for the grass roots pilot, that is how he designs his helicopters, a cheap people mover for the masses.