You want to know what's better than having actual MS developers interact with your issue on GH? Being able to submit a MR yourself and actually have that MR be merged in within days of it being good to go.
That's not just a dream, that's the standard way of operating for most large open source ecosystems. If you solve a known issue with a clear well considered merge request, and you've gone through all the prescribed steps your MR will get merged.
From personal experience I've landed MR's in the Ruby interpreter, in the Rust compiler and in the Rails framework. All as a complete outsider with no prior introductions to the team. Just be polite, follow the rules, solve something that's real with no architectural impact and it'll get merged (just mentioning these because they're ecosystems, I've had MR's merged in for dozens of smaller projects in the same manner).