So far, I'm not exactly enthusiastic about the change. There is one that I would have liked to have seen incorporated, but I guess they don't know how to program it.
Since they only allow you to book one Palo Brunch at a time, they pretty much make you take a leap of faith if you want to change a date/time you already booked. They will tell you that there is a spot available on a day (days that are sold out will simply say SOLD OUT), but not how many seats are available, what time, etc. until you cancel the spot you already have reserved. Meanwhile, if you do cancel your previous spot and you find that the time available doesn't work, it's only good for 3 people instead of 4, etc. you have to scramble back to your original date and try and rebook the spot you just freed up - that's if someone didn't just scoop it up while you were looking at the new date/time!
They should have it where you can see/preview the other date/time slots and if you choose one it will say: "You already have Palo Brunch booked for XX/XX at YY:YY. If you would like to book this new date/time, your previous reservation will be cancelled."