Drupal Views Field: Relationship Type B-to-A?
It is correct that not all fields from the CiviCRM RelationshipType entity are available in the the views by default. The socialistic party in the Netherlands had the same problem. And I created a drupal module for them to fix this. 

You can find the module at https://github.com/SPnl/nl.sp.drupal-civicrm-views-enhancement

This module adds the name-a-b, label-a-b, name-b-a, label-b-a, contact-type-a, contact-type-b, contact-sub-type-a, contact-sub-type-b, description, is-reserved, is-active to drupal views.