The experience of injected helicopter lycomings is already out here as Enstrom use them. Cutting out during autos is not just a Robinson problem. From my 1998 Enstrom POH " Sudden power cuts to idle are not recommended since the fuel injector is sensitive to improper adjustment of idle mixture, idle RPM and sudden momentary leaning of mixture caused by sudden power reduction". "Autorotation practice should be carried out over suitable terrain". At least it makes you get good at them!
Is Robinson's injection the same mechanical Bendix system used on the Enstrom? The start procedure is the same.
Induction icing is not an issue.
Why do Robinson need a 540 for 205 BHP?
My normally aspirated Lycoming 360 produces 205BHP and only uses 11 Gallons per hour. How much does the R44 use?
The Enstrom Turbocharged 360 can produce 225BHP continuously.
Will Robinson allow leaning the mixture in flight as Enstrom do?