Field collections compatibility

I'm having the same problem

is there any other way to organize fields in Drupal 7 ?

Services doesn't support things out side of drupal core.

Here is a simple fix to the field collections. I'm using Restful with XML data.

<!-- field collection starts here -->
<field_collection_item>
   <und is_array="TRUE">
      <item>
         <entity>
            <field_name>field_collection_item</field_name>
            <field_text>
               <und is_array="TRUE">
                  <item>
                     <value>Some text</value>
                  </item>
               </und>
            </field_text_unlimited>
            <field_text>
               <und is_array="TRUE">
                  <item>
                     <value>Some text</value>
                  </item>
               </und>
            </field_text_unlimited>
      </item>
   </und>
</field_collection_item>

Then in a custom module implement hook_services_request_preprocess_alter()

/**
 * Implements hook_services_request_preprocess_alter()
 * @note : Serivices module hook
 */
function YOURMODULE_services_request_preprocess_alter($controller, &$args) {
  foreach ($args as $key => $arg) {
    $entities = _service_fieldcollection_recursive_search($arg, 'entity');
    foreach ($entities as $delta => $entity) {
      $field_name = $entity['field_name'];
      $field_collection = new FieldCollectionItemEntity($args[$key][$field_name]['und'][$delta]['entity']);
      $args[$key][$field_name]['und'][$delta]['entity'] = $field_collection;
    }
  }
}

/**
 * Recureisve search on the array
 */
function _service_fieldcollection_recursive_search($array, $key) {
  $results = array();
  if (is_array($array)) {
    if (isset($array[$key])) {
      $results[] = $array[$key];
    }
    foreach ($array as $subarray) {
      $results = array_merge($results, _service_fieldcollection_recursive_search($subarray, $key));
    }
  }
  return $results;
}

This can be extended for all the other type of entities which has entity host as node. Hope this help.

#1180574: Integration with Services this may help.

Would the creator not be interested in this being part of the module or maybe even a sub module?