Communion was inaugurated with the Kingdom of God. If our proclamation is to be the Kingdom of God, it is realized in this worship, which God Himself has left us. (full disclosure- I was born baptist and am now Orthodox)
God is eternal, so our worship of Him needs to follow in that. Worship should appeal to every part of our humanity (our seeing, hearing, tasting, smelling, touching) but not our passions. I think that this communion being so much like the last time and the time before that is part of the message of the Kingdom of God and that it is eternal. I am most glad that it is ever the same and ever new.