When I last played with it checking out its capabilities, I found the thing I was mostly missing to really make use of it was the thing referenced in this article, the Component Model. Without a type model and binary specifications, interop was made a lot harder than it'd have been otherwise. Now that that's in, it becomes a lot more useful.

I was mostly looking at it for its state as being a cross-platform supported output platform of bytecode that's fairly well sandboxed. That makes it an excellent target for things like running untrusted plugins in an application in a performant manner.