Just in case it helps, I have created a task for this RfC at http://fab.wmflabs.org/T572. Please identify current blockers there (or here) in order to focus the contributions in the tasks that matter.
Shouldn't this be on Bugzilla instead of Phabricator? This bug has nothing to do with Phabricator and I thought we were currently only using Phabricator for bugs related to Phabricator.
Thank you, Derric Atzrott