The bad thing about using the Ballpark app for ticketing is when the typical face blind usher asks to see your ticket for the third time, and you're holding a beverage in one hand and food in the other. It's easy to flash your Nats Plus card, but it takes a bit longer to take out your phone, unlock it, go to the Ballpark app and display your ticket. Hopefully there will be Wallet integration, at the very least.