I agree with both sides of this 'argument' ...
I am a great believer in life that if you don't like something, change it.
So, if P&O no longer suits you, try elsewhere.
So much has changed that all of us have decisions to make, does the current offering still suit us?
In truth, for us, it probably still does. We will consider other lines, but the familiarity of P&O and the choice from Southampton is still a draw.
We might just have to consider itinerary, length of cruise and ship more.
Andy