You know those commercials on TV where they show a herd of people being told when to play and when to eat? Then they talk about eat and play when you want? That in a nutshell is HAL tradition vs the new HAL open seating.
We were given the choice on our cruise next year to take an assigned table and time or to take open seating. The way I understand it open seating is like eating on a restuarant. You get in line (like lunch on a HAL ship in the dining room) and wait your turn for an open table but you can show up whenever you are hungry and the dining room is open. Because we are anal-retentive and like to be told when to play and eat,,we choose the assigned seating option.
I think the though process is more people want to have their freedom and since you probably didn't make a choice, a choice was made for you.