We always eat early so the way I view it is it doesn't make much difference either way. I can select traditional dining and arrive early without having to wait on line to get to my assigned table or select anytime dining & be seated when I arrive when they first open.
I suppose it appeals to those that have been longing for that traditional dining experience to be seated with the same people each night. One thing for certain, it will make seating much easier to the DR personal, not having to keep track of each group at the door each night.