Community is all about open communication, and cultivating it through active participation. There is no need to take further first steps here, as support.mozilla.org is the open platform that community agreed upon. For face-to-face communications there seems to be All Hands meetings, as mentioned by Michele.

This communication in particular is about how one member is sharing their "discomfort" of the non-communicated automation efforts done by Mozilla, and is also expressing their resulting action - leaving that community.

Please don't conflate the efforts of institutions (Mozilla) with the ones of communities (SUMO). Transparency is a big factor that marks their difference. So yes, community is also about communication.