This looks really cool! Fuzzing is something I've been looking into more and more as I learn about it. I'll definitely keep this in mind for the future. Have you guys considered Rust support?
We have! afl.rs[1] is awesome, and seeing as it's found some interesting bugs, I think Rust would be a great addition to Fuzzbuzz. It's on our roadmap.
[1] https://github.com/rust-fuzz/afl.rs