It's not really to do with not getting tickets, it's to do with the queue. On a busy evening it's massive at my cinema, with it going right out the door often.
Well, you're going to be very disappointed with the way the advance booking is being trialled. You have to pick them up from the box office, not the ATMs. It defeats the whole purpose really.
I don't know if this would work at your cinema, but at mine if I show my card at the ticket check, they let me get the tickets from the Ben & Jerry's counter, where there's hardly wet a queue. It saves waiting at the box office at busy times.