For game development? I imagine having to use only structs but not classes would be something that forces a "non idiomatic D" experience. Dynamic arrays sound like something that's very useful for a game. I don't know, there are plenty of features that are incompatible with better C that makes D, D. Generally speaking, garbage collection would be the biggest in my opinion.
I fully agree with you, but I think that if you present it as an option to somebody you should write a line or two about the potential downsides, so they have a better picture. Sorry if I was too abrupt in my criticism of your post. :)
