As a developer working on a site with thousands of concurrent connections that recently went to production with RC1 and is implementing back-end applications as well, I've been looking forward to RC2. All this talk that .NET Core will never work for X or Y reasons is amusing - it works right now on large sites/projects, and has been a refreshing change for our team(s) with a minimal amount of headaches.

I would suggest trying it before knocking it at a theoretical level, especially the MVC Core stuff that combines 4.X's MVC and Web API and enhances it.