It's the day of the announcement and I am already nervous with how this is going. There are some really easy lessons here and they kinda stumbled already.
A major one is do not add cost to those that do not want to participate. Also minimize the cost to those that do.
I know pinball is different but in gaming I do not think there has ever been a successful add on and everyone has tried. The golden rule is release it with the new engine, new hardware, pro version whatever but never release an add or expansion to existing hardware.
The QR code is doable if it was just a instruction card the operator had to print once for each pin. There is zero reason to have a screen or create a code in real time. Most TV apps just show you log in on your phone and enter a 6 digit number. That number could easily be displayed on the existing LCD.