Reading these sort of comments send a shiver down my spine. I loved the original Anytime Dining experience on Princess, I never really warmed to the early and late fixed dining times on our early cruises in 2004/5, so when anytime came in I thought it was fantastic.
However gradually over time the ability to roll up at your designated MDR whenever was most convenient to you, has become watered down. Princess, and other lines as well, seem to have pushed passengers, sorry guests, to pre select as many dining times, and table locations, as there are days on the cruise. I guess it helps them to plan peak loading better, and probably enables them to minimise staffing, but it's taken all the joy of freedom dining away, IMHO.