D is complicated for sure, but it doesn't have the issues you mention, and is still fun after years. I would be curious what fatal flaw you find to not consider using it. To me it certainly feels like a dirty Haskell which values your liberty very much.
Andrei Alexandrescu did a reddit IAMA recently (with Walter Bright contributing) and if you read through the posts I think you'll come away with the impression that D is very much here to stay (I certainly did anyway).
