The main feature - for me - was the ability to use the same project.json to compile a project for multiple frameworks. Sad to see, that they ditch project.json - especially after the overhaul one or two weeks ago, which was a necessary cleanup. How will they be able to release the rc2 on May, 16th, week they change a critical part of the build chain again? Does this mean, that they are ditching dotnet CLI too?