At the Accessibility Sprint in Montreal today, I noted a certain degree of frustration with UI changes being committed before they've been reviewed for impacts on accessibility.
And then when I got home tonite I remembered that Randy Fay has started an initiative to provide some form of governance for Drupal (http://drupal.org/node/1526026). Unfortunately, the discussion so far has been mostly about conflict resolution which, to my mind at least, is actually somewhat peripheral to governance.
Instead I've been trying to introduce the idea that governance is mostly about making sure that stakeholders are engaged at the right time. I've posted a couple of issues here http://drupal.org/node/1608304 and here http://drupal.org/node/1606788 and the whole governance queue is here http://drupal.org/project/issues/governance.