We should not view the introduction of this airframe/engine from a mature market centric position.
Cessna and other OEMs see the future growth market for sales will be in the regions where Avgas is not available.
The future market for light aircraft sales in the traditional markets is bleak at best.
There is no long-term future in Avgas.
Other OEMs will focus their attention in a similar direction. Such as Gipps Aero with the (future) relatively cheap GA10.