Carol Marlow is taking over at P&O so things should pick back up again....she was in charge at Cunard.
However, with the demise of Ocean Village it has been said that Carnival Corporation want to entice OV guests to P&O by dumbing down the formality, so perhaps that is what you experienced aboard Oriana to a degree.
Once Carol gets herself settled, things will sort themselves out, but in the eyes of Carnival Corporation, P&O/Princess can never be better than their flagship companies...Cunard, HAL and Seabourn.
P&O, Princess, Costa, AIDA, Iberocruceros will always be slightly more mainstream and aimed towards the family cruiser rather than the higher echelon.
Some will argue that Carnival Corporation was the best thing that ever happened to these companies, others will tell you otherwise. They have all started to cut back on quality and service levels, some more subtle than others.