The "Ambitious proposal" poses a few major issues for me:
1. Allows for account re-opening after closure... This would change the entire dynamics of the Conflict Escalation process and does not seem to be consistent with WikiTree's mission, pledge and commitment (Finalizing Rules #3).
Knowing that they could always request a review and that account closure is no longer deemed permanent, someone could easily skip through stages of the process (e.g., by not responding and getting escalated) in order to hit the review stage and be done with the issue.
I feel this means this proposal would also need to include a full revamp of the entire Conflict Escalation process (Mentoring and Mediation Processes specifically) in order to allow for the additional roles (e.g., Review Panel and Intermediary).
2. This proposal would also need confirmation from the WikiTree Team that it is even possible to reopen the account (Finalizing Rules #2). What are the limits? What is lost (e.g., DNA test data, Images, Biography, email and password)? What about Private accounts that were deleted upon closure ("If you created profiles of living people and have not shared them with other members they will be deleted when your account is closed")? There are too many variables here to think this is able to be supported in a viable way.
3. [Policy on panel selection to be developed later]. This is a vital part of the proposal, so it would be prudent to have these details fleshed out now, not later. I am not sure how we can expect anyone to approve a proposal when major components are not included (or fully developed). For example, how many people make up a review panel - 2 people or 13 people? Are these people permanently designate as the Review Panel, or are they selected at random each time a panel is needed? How are they selected (e.g., application process, nomination, etc.)?
4. What are the limits if this were to be approved? Who gets to request a Formal Review? An account closed 4 years ago? An account closed two days before this is enacted?
EDITED: My numbers where out of sync and minor wording changes for clarification.