This will not add variables to settings. Function `ajax_command_settings()` just creates ajax command, that could be added to commands array. If you want to update settings after view ajax completed you should use something like this:

    /**
     * Implements hook_views_ajax_data_alter().
     */
    function module_name_tricks_views_ajax_data_alter(&$commands, $view) {
      if ($view->name == 'your_view_name') {
        $setting = module_name_get_settings($view);
        $commands[] = ajax_command_settings($setting, TRUE);
      }
    }