I think this is the only way it will work, being realistic- once the club has proof of your vaccination status, then the ticketing could work as normal, provided you have a smart phone. Those who don’t will have more hassle at the ground, but if the majority do use the smart phone option then in theory it will make it easier for the process as a whole.
I would imagine that the government would agree to this (i.e. use of the vaccine QR code) as long as they have the ability to revoke people’s vaccination status if they are pinged by the COVID app.
The story from the Times this morning suggests that the PL voluntarily want to have the vaccination status rule in place for the start of the season, rather than in September, so we could hear something about this relatively soon.