Simplify "force preview" option to checkbox

I read the Drupal 6 review Dries linked to on the list and found one UI issue that sounds really trivial to implement (among a lot of others that would entail one horrible mess). If the string freeze hasn't come and gone yet, would the following be up for consideration (if strings are frozen, sorry for living under a rock)? I find myself at least partly in agreement with the principle that a "yes/no" option is best turned into a checkbox, not two radio buttons:

Preview Post... This is where one-line options would really improve Drupal's interface. All you need is the line: "Must users preview posts before submitting? Yes No "

This is more of a concept question, so instead of rolling a hard to read patch (which anyone could), here's a clear view of the form element that would be replaced.

  $form['node_preview'] = array(
    '#type' => 'radios', '#title' => t('Preview post'), '#default_value' => variable_get('node_preview', 0),
    '#options' => array(t('Optional'), t('Required')), '#description' => t('Must users preview posts before submitting?')
  );

  $form['node_preview'] = array(
    '#type' => 'checkbox', 
    '#title' => t('Require users to preview posts before submitting'), 
    '#return_value' => 1, 
    '#default_value' => variable_get('node_preview', 0),
  );

(Disregard code-style differences)