Dear Reverend Monk Elias,
The Blessing with the Chalice, I believe, served to underscore the fact that it is the Lord Jesus Christ Himself in the Eucharist who is blessing His people.
This began the train of the priest to the side altar with the Chalice.
The Kyivan Church developed the practice of touching the Chalice to people's heads, people who have already communicated, and those who wished to have this done lined up along the way to the side altar.
The blessing with the Chalice certainly extended to one and all, whether they communicated or not.
Certainly in the East, Christ is totally present in the Divine Liturgy from its very beginning, and not only at the Canon.
We receive Christ into our hearts but also adore Him as we kiss the Chalice, are touched by It and are blessed with it.
All these are forms of communion, to be sure!
But it is all done within proper liturgical context.
Vatican II was concerned that such extra-liturgical devotions were taking away from the centrality of the Divine Liturgy.
The Suplicatsia service was actually poorly translated from Polish into Slavonic.
For example, in the invocations the term "molisia za nami" is used or, literally, "pray after us" in Slavonic or Ukrainian.
And Fr. Lypsky our former parish priest (who couldn't stand the Suplicatsia) said, "but why not say, 'pray before us' rather than 'behind us?'"
So it showed an almost slavish devotion not only to a Latin practice, but to the Polish language from which religious culture it came from.
I would certainly not oppose any parish, Catholic or Orthodox, that has this devotion.
You'd have to ask Cantor Joe Thur for his view. But I think he likes Latin public devotions like some interior designers like plastic lawn furniture.
My grandfather who was a priest served this.
Perhaps, just perhaps, some liturgist, a la Fr. Isidore Dolnitsky, could develop this into a proper Moleben service, with Canon etc.?
Patriarch Josef, as you know, did hours of adoration.
This practice is popular in western Ukraine today, with 24 hour Eucharistic adoration in some parishes.
I met an Eastern Catholic priest who had this in his village, and even children took turns praying in Church for an hour each day.
Alex