I think cashless is the way to go, but I just find the removal of TapuTapu (or lack of replacement) bizarre from a revenue perspective. I understand from the queue perspective, but its a pain to go back to your locker, retrieve your phone, head to the bar, return phone to locker and then on to whatever you want to do.
Same at just about any other water park, how they haven't come up with a cheap RFID solution is beyond me.