On my last cruise with the Pursuit on January 2023, we had two guest speakers. The one who was the „destination lecturer“ visualized well, was an economist and gave good general information about the countries we visited (something similar you can find in wikipedia or internet). No details about the ports of call (where we dock, what to do on your own, etc).
I have written a review about this cruise, where you can find information on your other questions if you wish. The review is here in cruise critic under Azamara Pursuit reviews.
Ivi