A smaller and updated logo is fine, but the color scheme on the rest of the bus just doesn't look flow. They should have just had it that shade of gray and not added the accents.
This was one of the only things that I had a problem with the wristbands. No one would be able to get your card number, but they could have found a way to make spoofed bands and then buy a large amount of stuff at DtD that would be sold later on. A PIN would stop that from happening.