Right now I'm keen to get more personal experience with Rust, and hopefully in the wider team. I'm particularly interested in [Tokio](https://tokio.rs/), which should address some of our concerns about the existing concurrency support.
Also, in same reddit comments there's a longer (quite argumentative) discussion on Rust concurrency that you might be interested in: https://www.reddit.com/r/programming/comments/5fyhjb/golangs...