A FADEC is on the way from Lycoming, I would guess that they could reduce the fuel burn by 25-30%,
Compared with flying full rich, sure.
Otherwise they must have invented a whole new branch of physics
I can get the same result by flying at peak EGT.
require Deisel engines to have dampers fitted are outweighed by the advantages of a MOGAS burning FADEC controled engine.
I am sure that is true - so long as the juice is available, so OK from the US perspective. The case for burning avtur hangs 75% on availability and taxation. The other 25% is better MPG, but it is only about that much.