Without imputing metaphorical language and in a strictly literal sense, I would choose to reject such a belief and acceed to obedience to the words of YHWH my Creator that we not eat blood, nor do we eat flesh of man.
However, since I do see it as metaphorical, I can see Yeshua and how he continues to make reference to himself and reveal himself in terms of the Passover and feast days. Passover is a "remembrance", so when he says "Do this in remembrance", he is further showing his link to the observance of the Passover. He also links this to the eating of the flesh of the lamb of the Passover meal and the tradition of drinking wine(blood of the vine) signifying the blood of the covenant.
B'rakhot
"Without imputing metaphorical language and in a strictly literal sense, I would choose to reject such a belief and acceed to obedience to the words of YHWH my Creator that we not eat blood, nor do we eat flesh of man."
Our Lord’s listeners understood him perfectly well. He repeated himself several times, and they knew what he meant. People started getting up and leaving. They heard him, they no longer thought he was speaking metaphorically.
On other occasions when there was confusion, Christ explained just what he meant (cf. Matt. 16:5–12). Here, where any misunderstanding would be deadly serious, there was no effort by Jesus to correct. Instead, he repeated himself for greater emphasis. If they mistook what he said, why no correction? Instead, he lets these people, his own disciples, walk away. He doesn't call them back. Instead he looks at the Apostles, and asks them if they are going to walk away as well.
Instead, Christ takes the matter far beyond symbolism by saying, "For my flesh is food indeed, and my blood is drink indeed" (John 6:55). He continues: "As the living Father sent me, and I live because of the Father, so he who eats me will live because of me" (John 6:57).
The Greek word used for "eats" (trogon) is very blunt and has the sense of "chewing" or "gnawing." This is not the language of metaphor.