I would say definitely.
Much of the book is real life experiances, both rays personal ones and organization as whole accounts. Those dont change with time and they still carry a lot of significance. Milawa vs Mexico bribery, flip flopping on teachings and the impact on peoples lives, the writing of the aid book etc etc all still have relevance.
further, as marvin noted, the org still runs the same. Ray pulls the curtin back for those that were never in middle managment let alone upper cult managment, and shows how there is nothing special and certainly nothing spirit directed going on there.
The doctrinal stuff was interesting to me at the time i read it because i was still semi believing. Now, not so much, but that one aspect doesnt lessen its value for me at all.