Seeing this makes me quite cross.
When Azamara dramatically, significantly, horribly changed the itinerary for the expensive Black Sea cruise to a far, far inferior one, no offers of any form of compensation were made. In fact, some cruisers were charged to transfer the booking to an alternative cruise*. Admittedly, no change of embarkation or debarkation ports were involved. But, for some, the impact was significant.
*see the current thread on significant changes of itinierary