Rust might have gone too far the other way. Yes it strives to be a modern language, with a lot of functional programming features and "OOP" done right (aka no inheritance, simply method polymorphism). To me Rust is more a C++ replacement than a C replacement.
A replacement for C should try to be as simple as possible while fixing C weak typing mess with strong typing for instance, including when it comes to pointers (for instance like in Ada where you can't just take the address of anything you want, you need to declare it as aliased to begin with). In fact Ada tries hard to make pointers redundant which is a great thing. This and range types and bound check arrays( Ada has a lot lot of great ideas, and "C style" Ada is a treat to use).
So a C replacement should keep the procedural nature of C, with closures perhaps, but not go further in terms of paradigm. C aficionados often claim they love C because it's "simple"(it isn't) That's what they mean, they love C because you can't really do OO with it.
On the other hand, Rust macros are exemplary of what a good macro system should be.