To aid in communicating with participants, it would be helpful to come up with a statement of scope so everyone knows what is and is not a part of ESTree. There has traditionally been some confusion around this:

• Do we want to define expectations around source locations?
• Do we want to incorporate a concrete syntax tree?
• Do we want to include common extensions like JSX?
• Do we want to include comment types?

From the response (or lack thereof) to these various issues, my guess is the answer to each is "no," but it would be nice to get some consensus and then narrowly define the scope of the project so we can more easily respond to issues and PRs as they come up.