I took out my membership last March and the email had the virtual card attached. I think the file was a .pik file that I was able to import into the WalletPasses app. So just to be clear they are sending you an email saying you have easyjet plus but not attaching the virtual card (that's how it worked for me)? If that is the case then that's ridculous of them not to have an alternative solution. In the email they sent me it said "You will only require your virtual card to redeem benefits at the airport if you don’t include your membership details in your booking.". So I would say that onboard they should know that you are easyjet plus. I cannot see the number on any of my old boarding passes though.

Bottom line, sounds like they have gone backwards.