What should we make of the Eastern tradition of venerating Adam as a saint?

You would expect this to occur somewhere, where somebody has more sympathy for Adam and takes the step of declaring him a saint, but they do not really know, because the only way we would know is by revelation. Some point to Luke's genealogy, which ends 'son of Adam, of God,' but that is genealogical, not spiritual. Regardless of whether Adam sinned, he came from God; that is simply a fact and is not affected by whether he sinned. And the word 'son' is not even in the Greek there; it says 'of God' in the genealogical sense only. There is no indication in revelation, general or private, that I know of, that Adam is saved and that such a private revelation has been approved by the Church. The only source that says things like that would be Anne Catherine Emmerich, and you have to take everything she says with a grain of salt. As far as Scripture is concerned, there is no indication that Adam or Eve made it to heaven. If we get to heaven and find they are not there, I would not be surprised; I am not being hard on them, I am simply saying we have no revelation that says otherwise. The Catholic Church has been silent on that issue, much as it has been silent about infants who die and even about whether the traditional doctrine of limbo is correct. Some things we do not know, and we leave them in God's hands. That is where I would leave Adam and Eve.