I don't agree at all. It only adds stress if you are ones who makes ADRs and then don't show up for them. For me the system has taken away the stress. You don't have to know exactly what ADRs you want at 180 days out--most ADRs are much easier to get now that people know they will have to pay a fee for not showing up. The amount of ADRs booked "just in case" appears to have dramatically dropped.
I'm glad they have started charging a fee!
I would say over the course of 20yrs of vacationing at WDW annually, on average, we made about 3/4 of our PS reservations per trip. I never doubled-up on ressies in the same day to cheat the system, and if I knew we weren't going either the night before or earlier on the day-of, I did call Disney Dining if time permitted (sometimes there was a long hold time).
I do like a planned vacation. But every vacation needs a little room for flexibility, whether that flexibility be a change of mind, or an illness, or something else that changes your plans. And those changes don't always happen 24hrs in advance.
Ever feel like staying at the MK instead of leaving to go make a dinner ressie at Epcot? Ever have a member of your party not feel well? Ever treat the family to a Mickey bar maybe a little too late in the afternoon and realize dropping $200 on a sit-down dinner at 6p is probably going to be a waste of money? Ever see the kids enjoying the afternoon poolside games and not want to spoil their fun by pulling them out? Ever want to have a little spontaneity in your vacation?
Perhaps you travel at less busy times of the year, or are dining at less competitive restaurants, but I have not found that the ADRs are easier to get now that a cancellation fee has been implemented. I have school-aged children, so we have to visit when the crowd levels are high. I have to book ADRs, and usually well in advance. The past 2 trips, with the new system in place, I can honestly say has reduced our flexibility, added stress, and in some ways detracted from the overall relaxation and enjoyment of the vacation.