I think the sweet spot for WCF (for us at least) is for our internal APIs. The ability to easily expose the same service over a binary TCP stream or over HTTP m

I think the sweet spot for WCF (for us at least) is for our internal APIs. The ability to easily expose the same service over a binary TCP stream or over HTTP makes a fantastic tool when you're trying to get a lot of different systems to talk to each other. For external or HTTP-only APIs I completely agree that it's often overkill. Frameworks like servicestack are much easier to work with in those cases.