I would have said their Slack group, if it was still taking registrations. Otherwise, as lame as it may seem, I'd suggest throwing the idea up on their Weekly Discussion thread on Reddit as a feature request and see if they pick it up, as they are a team that is actually active in responding over there.

You couldn't just throw it up anytime, and hope that it sticks though. It ideally would have to be:

• one of the first posts for that week;

• during a week where something else (e.g. a minor scheduled event) was going on, which draws more attention than the number of eyeballs that normally would be there any other week;

• and, you'd have to nurture the responses a bit, to get enough upvotes from other people's reply comments to keep your suggestion towards the top of the thread, before it gets wiped clean again at the end of the week.

Not the easiest feat, but totally doable. Short of somehow PM'ing Julian himself, I can't think of any other reasonable way to get their attention on this if it hasn't already.