Glad to see this thread. I was also getting very concerned. This will be our first cruise and there are so many questions. We booked thru a TA, but I have kept up on line with Princess by booking excursions, etc. However, I had not received any documents and the cruise is drawing near. I visited with my TA yesterday. She contacted Princess to confirm while I was there. She printed "E-Boarding Passes" and itineraries and flight schedules. She confirmed with American for seat assignments. Princess never sent our pre-cruise packet, so we do not have luggage tags and whatever else is supposed to be included with that packet. Our TA requested a second mailing.
I like most other rookie cruisers, would like to have standard travel documents. Our TA assures us that all will be fine. She said that Princess is moving to E-documents and as little as possible paperwork for the traveler. Keeping my fingers crossed that we will not encounter any problems! Good luck to others who are in the "same boat".