Rules integration and hard limit of 50 on relation_query

Related to #1700538: RelationQuery should not force the range of results to return

In troubleshooting why Search API was only loading 50 relations, I realized that the pseudo entity wrapper property for relations calls relation_rules_get_related_entities to load the related entities. This method has a hard limit of 50 as mentioned in above. @chx suggests in #1700538: RelationQuery should not force the range of results to return that the 50 limit be passed as a default rules option (I'm guessing he means rules parameter).

There are three reasons I'm confused here:

1) relation_rules_get_related_entities is NOT defined as a rules action in hook_rules_action_info. Do we need to write an action to call this and have limit as a parameter?
2) If no, relation_rules_get_related_entities is only used to define properties of the entity in relation_entity_property_info_alter(), so why is it in the rules file?
3) If the 50 limit is for preventing potential memory/timeout issues, is the alter below the best way around this situation

/**
 * Implements hook_entity_query_alter().
 */
function MYMODULE_entity_query_alter(&$query) {
  if (!empty($query->entityConditions['entity_type']) && !empty($query->entityConditions['bundle']) && !empty($query->range)) {
    $entity_info = entity_get_info('relation');
    $bundles = array_keys($entity_info['bundles']);
    if ($query->entityConditions['entity_type']['value'] == 'relation' && in_array($query->entityConditions['bundle']['value'], $bundles)) {
      unset($query->range);
    }
  }
}