I'm not sure who specifically is working on improving the macro system, but it's definitely something that's been prioritized. My primary recommendation for co

I'm not sure who specifically is working on improving the macro system, but it's definitely something that's been prioritized. My primary recommendation for contacting the relevant people would be either the Rust internals forums (https://internals.rust-lang.org https://internals.rust-lang.org) or the #rust-internals channel on irc.mozilla.org.