Good point. Usually chrome-eng-review evaluates requests like this.

I've chatted with jbudorick. We don't think there's that much demand from devs for this for us to set up a new waterfall bot, given the amount of effort and resources and time it'll take to set this up.

Feel free to bring this up to others; if this is deemed important we can easily do this.

In the future, hopefully setup costs will be smaller and this will be an easier request to handle.

I'm going to mark this as wontfix, as it seems like there's not a lot of support going through to make this a priority. We can look into it next quarter if it is still an issue.