I am no theologian and I don't want to take sides, but let me just share this observation that in Ukraine, people generally do not imagine going to the Chalice without confessing their sins to the priest first. After the Anaphora and Epiklesis, a prist would even say out loud, "now please, THOSE WHO HAVE PREPARED THEMSELVES (meaning, those who just had their sins confessed to me an hour ago, or yesterday night), please form the line here." Last summer, when I was in Ukraine, I, being "spoiled" by our local US custom of not going to Confession directly before the Eucharist, went to the Chalice during a DL, and the celebrating priest looked at me and asked, straightforwardly, "have you prepared yourself?" When I mumbled something like, "well, I haven't eaten anything today and I just confessed my sins together with everybody else in the church, saying, "I believe, Lord, and confess that You are verily the Christ..." - he just made a gesture, telling me, "go away. Next." That's how strict it is over there (BTW, in all jurisdictions, canonical as well as non(yet)canonical.)
On the other hand, because there exists this custom of confessing sins directly prior to the DL, there is always a long line of penitents before the start of the DL, around 8:30-9:30 a.m., and it usually takes the priest some 5-6 minutes to go over the whole Holy Mystery, almost never longer than that.