Sounds like a pretty amitious mission.
Yes, I think it is an impressively ambitious mission. They are trying a host of new technology: microwave ion propulsion, the touch-and-go's under autonomous systems, attempting a return to drop off the samples, and there was the even the possibility of further missions, though I wonder with this latest problem (Hayabusa also was very negatively affected by the huge bursts of solar activity in the last few yeras) if those are still on the table.