If I was disfellowshipped, I would have a lot of fun with this. I can imagine the conversation:
- Why should I go?
- Jesus said: "Keep doing this".
- Who was he talking to? Me or the anointed?
- The anointed, but, by extension, the great crowd, us, you.
- So, you want to invite me, and the general public, to a memorial celebration to which I am not part of. It doesn't sound right.
Could you imagine verses in the bible that would explain how Jesus invited the public to a certain place, had them seated in a large room and asked them to wait patiently while he shared wine and bread with his 12 disciples, no one else? Then, how he went to a podium and explained to them that though they were not part of that ceremony, they were welcome to have witnessed it; They too, would benefit from that arrangement. Can you imagine how that would be written in the bible? How it would actually have happened? What would it say about Jesus' personality?
I'm puzzled by what you're doing with this. The Jewish Passover was a "sacred" meal shared with the family and close friends; Jesus made it his own by adding the wine and the bread at the very end. Why would that not be sufficient?
Why not keep it simple?