The article referenced by this article lists nine features of which eight are syntactic sugar. (Being able to declare the out parameter in place has a very minor but significant impact: Preventing abuse of a variable intended to be used as the out parameter.)

It's disappointing to see the team spend its time on so many minor features rather than tackling fewer major improvements.

I'm sure we all have our pet features. My wish would be structural typing: Very few of the C# developers I've worked with in the past couple of years have embraced isolation testing. A significant reason is the frustration with "extra" interfaces and the distractions they introduce in code navigation. Anything that eases the the uptake of isolation testing would dramatically improve software quality, which as we know, would dramatically improve our efficiency.