Where I could see this being useful is if you have all the tickets on 1 phone and you dont want to go all in at the same time.It depends how it's set up. I don't think very many people are going to bother walking all the way to the front gate just to get a wrist band ahead of time. Do we all have to get a wrist band to get in even right before the game? Is there going to be a dedicated line off to the side for those that got wrist bands early? Those are the type of things that will determine how well it works. Seems unnecessary to me because by the end of last season things were working pretty well.
My parents still use flip phones so if I bring them to a game we would all have to go into the game together.