Event API return request params format is partially outdated

According to the api explorer a request for getting events with certain return values (like is_full) should look like this:

$result = civicrm_api3('Event', 'getsingle', array(
  'sequential' => 1,
  'return' => array("is_full"),
  'id' => 441,
));

But this doesn't return the expected result (including is_full):

{
    "id": "441",
    "is_full": 0,
    "is_error": 0
}

Instead my requested return value is missing, but price_set_id is given:

{
    "id": "441",
    "price_set_id": "",
    "is_error": 0
}

I've checked civicrm_api3_event_get and noticed, that the api function is still expecting the old return syntax (with return.foo instead of return => ['foo']) for some (but not all) values (like is_full):

if (!empty($params['return.is_full'])) {
  _civicrm_api3_event_getisfull($events, $id);
}

I think it should be

if (!empty($params['return']['is_full'])) {
  _civicrm_api3_event_getisfull($events, $id);
}

Other return values like title or is_active are not effected, because they are returned by the _civicrm_api3_basic_get, which is working as expected (with the new return format).

And why I get price_set_id? Because of

if (!empty($options['return'])) {
  $events[$id]['price_set_id'] = CRM_Price_BAO_PriceSet::getFor('civicrm_event', $id);
}

But the doesn't make sense at all (at least to me).