View listing taxonomy terms broken after Views-6->7 migration

Hi
One of the sites I'm currently migrating from D6, got this simple view that ended up broken in 7.x. The only thing it does, is listing out all taxonomy terms in a specific vocab. Views correctly detect that it is broken and tag it accordingly. Editing the view show that it is missing, Fields, Filter criteria and Sort criteria but the rest seems to be OK. I'm not sure if migration was suppose to handle this type of upgrades or not, pls let me know, and if not I'll shut up and close the issue.

$view = new view;
$view->name = 'all_tags';
$view->description = 'view to list all tags';
$view->tag = '';
$view->view_php = '';
$view->base_table = 'term_data';
$view->is_cacheable = FALSE;
$view->api_version = 2;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->override_option('fields', array(
  'name' => array(
    'label' => '',
    'alter' => array(
      'alter_text' => 0,
      'text' => '',
      'make_link' => 0,
      'path' => '',
      'link_class' => '',
      'alt' => '',
      'prefix' => '',
      'suffix' => '',
      'target' => '',
      'help' => '',
      'trim' => 0,
      'max_length' => '',
      'word_boundary' => 1,
      'ellipsis' => 1,
      'html' => 0,
      'strip_tags' => 0,
    ),
    'empty' => '',
    'hide_empty' => 0,
    'empty_zero' => 0,
    'link_to_taxonomy' => 1,
    'exclude' => 0,
    'id' => 'name',
    'table' => 'term_data',
    'field' => 'name',
    'relationship' => 'none',
  ),
));
$handler->override_option('sorts', array(
  'name' => array(
    'order' => 'ASC',
    'id' => 'name',
    'table' => 'term_data',
    'field' => 'name',
    'relationship' => 'none',
  ),
));
$handler->override_option('filters', array(
  'vid' => array(
    'operator' => 'in',
    'value' => array(
      '1' => '1',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'vid',
    'table' => 'term_data',
    'field' => 'vid',
    'relationship' => 'none',
  ),
));
$handler->override_option('access', array(
  'type' => 'none',
));
$handler->override_option('cache', array(
  'type' => 'time',
  'results_lifespan' => '300',
  'output_lifespan' => '300',
));
$handler->override_option('header', 'All Tags');
$handler->override_option('header_format', '1');
$handler->override_option('header_empty', 0);
$handler->override_option('items_per_page', 1000);
$handler->override_option('use_more', 1);
$handler->override_option('use_more_always', 0);
$handler->override_option('style_plugin', 'grid');
$handler->override_option('style_options', array(
  'grouping' => '',
  'columns' => '4',
  'alignment' => 'horizontal',
  'fill_single_line' => 1,
));
$handler = $view->new_display('page', 'Page', 'page_1');
$handler->override_option('path', 'knowledgebase/all_tags');
$handler->override_option('menu', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => '0',
  'name' => 'navigation',
));
$handler->override_option('tab_options', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => 0,
  'name' => 'navigation',
));