What I mean about Augustine and the statement of adoration is that the concept of Eucharistic adoration and the distinction between adoration and veneration had not been defined in his time. We can’t use our current definitions when reading back in this point of time when these words were not yet defined in such a way. Also, because Augustine believed that the elements became consecrated and holy it would make sense that he would honor these elements, just as some Christians venerate symbols, icons and sacred items today. An item being consecrated does not mean that it has undergone a physical change. (Maybe holy water would be an example - it is not physically changed, but is blessed or consecrated and would not be dumped down the drain or dumped into the gutter.) We can not impose our later definitions of adoration back on Augustine’s writing and know exactly what he meant. What he meant by adoration could be what people today mean by veneration. We need to look at the context of the entire writing to understand more fully what he was describing.
I can appreciate that the term symbol had a slightly different connotation at that time. You did provide quotes from JND Kelly and Darwell Stone (who are Anglican and believe in the real presence) about the different understandings of the word. However the word symbol has never meant that an object transformed from one thing to another. The translators feel that the closest word to translate these terms from Greek or Latin to English is using terms symbol, figurative and metaphor and not the terms transformation, literal, and conversion.
JND Kelly distinguishes the symbolic understanding from the conversion understanding when describing the development of the ideas around the Eucharistic presence from the time period between Nicea and Chalcedon.
“In examining the later doctrine of the Eucharist it will be convenient, as in Chapter VIII, to begin with the ideas currently entertained about the Lord’s presence in the sacrament. Eucharistic teaching, it should be understood at the outset, was in general unquestioningly realist, i.e. the consecrated bread and wine were taken to be, and were treated and designated as, the Saviour’s body and blood. Among theologians, however,
this identity was interpreted in our period in at least two different ways, and those interpretations, mutually exclusive though they were in strict logic, were often allowed to overlap.
In the first place, the figurative or the symbolical view, which stressed the distinction between the visible elements and reality they represented, still claimed a measure of support. It harked back, as we have seen, to Tertullian and Cyprian, and was given a renewed lease on life through the powerful influence of Augustine. Secondly, however,
a new and increasingly potent tendency becomes observable to explain the identity as being the result of an actual change or conversion in the bread and wine. The connexion between these theories and the different ideas about consecration referred to in the first section of this chapter hardly needs to be pointed out.”
archive.org/stream/pdfy-CY7YNVnvFwggDjnT/103911481-J-N-D-Kelly-Early-Christian-Doctrines#page/n451/mode/2up/search/440
So while we may agree that the connotation of the terms has changed over the centuries, there was at this time still a varied understanding of the Eucharistic elements that was distinguishable and defined by scholars.