The Anglican/ Episcopal tradition was begun on a faulty premise and its demise will be caused by same.
Unless you eat of the flesh of the son of man and drink of his blood you will NOT have life within you.
Tu es Petrus...
Actually, the Anglicans move toward liberalism coincides with moving towards RC Eucharistic doctrine:
Representatives of the Anglican and Roman Catholic churches declared that they had “substantial agreement on the doctrine of the Eucharist” in the Windsor Statement on Eucharistic Doctrine developed by the Anglican-Roman Catholic International Commission, as well as the commission’s Elucidation of the ARCIC Windsor Statement.
On January 6, 1994, the ARC/USA bishops affirmed “that Christ in the eucharist makes himself present sacramentally and truly when under the species of bread and wine these earthy realities are changed into the reality of his body and blood,” while stating “In English the terms substance, substantial, and substantially have such physical and material overtones that we, adhering to The Final Report, have substituted the word truly for the word substantially...” The bishops concluded “that the eucharist as sacrifice is not an issue that divides our two Churches.”
This is understood as amounting to an acceptance of the doctrine, with an expression of a reservation about the use of the name of the doctrine in English because the word is misunderstood by English speakers .- http://en.wikipedia.org/wiki/Anglican_Eucharistic_theology#Transubstantiation
Furthermore, RCs overall are typically close to Episcopalians in evidences of spiritual commitment, being close to last in such, as well as also being far more liberal in moral views than their evangelical counterparts: http://www.peacebyjesus.com/RC-Stats_vs._Evang.html
In addition, your interpretation of Jn. 6:53 would require one to believe in Transubstantiation to be born again, which is clearly contrary to scripture, as well as how Jesus lived by the Father, which is what He used to describe how we “live” by Him,” (Jn. 6:57), in which His “meat” was to do His will, (Jn. 4:34) as He lived by every Word of God, (Mt. 4:4), that being spirit and life, (Jn. 6:63) and in John and the rest of the N.T. is how souls gained life in themselves, (Jn. 20:31) by believing the gospel . (Eph. 1:13)