Very helpful article. Thanks for the link. I’ll make it part of my collection of resources. Very helpful hints from the Talmudic usage. That’s another reason to like John Gill’s commentaries too (one of my e-sword commentaries). Lots of good Hebraic info. Really helps set the context.
The normal, communal meal is saying I am as you are, thus the Lord's supper and signifies corporate communion with the one it is sacrificially dedicated to, that being the Lord who bought the church corporate with His sinless shed blood, (Acts 20:32) making them members one of another, who show that death and the covenantal unity it bought by together taking part in that communal meal.
The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ? For we being many are one bread, and one body: for we are all partakers of that one bread. (1 Corinthians 10:17)
The communal ("we") meal signifies corporate( "one bread") communion with the crucified Christ, and the love we are to have for each other in that purchased body, which the Corinthians were failing to do, thus they really were not coming together to eat the Lord's supper, but to selfishly and independently eat supper.
Likewise to be a partaker in the table of pagan religious feasts is to be "have fellowship with devils," since "they sacrifice to devils, and not to God," (1Cor. 10:20) which is correspondent to the communion of the blood of Christ.