"And the problem with interpretation is not whether it's literal or figurative, but whether it's condoned by Tradition or not."
Like the Tradition of the ante-Nicene fathers who interpreted scripture in opposition to the veneration of images? Or the Tradition of the early Christians who prayed only to God, not to the deceased or angels? Do you agree with the Marian beliefs of the earliest Christians, such as their Tradition that Mary committed sin?
I agree with the principle that we can accept an interpretation of scripture that isn't derived from a grammatical-historical method of interpretation, if a verifiably authoritative entity is giving us that interpretation. For example, since Jesus is God, He would be in a position to know that an Old Testament passage has a secondary meaning that can't be attained through a grammatical-historical method of interpretation. We would be justified in accepting such a secondary meaning for an Old Testament passage, since that secondary meaning had been taught by Jesus.
The problem is that you and other Eastern Orthodox don't give us any reason to believe that your concept of Tradition has the authority you claim it has. You would first have to make an objective case for that system of authority by means of interpreting the relevant historical documents through the grammatical-historical method. That's the normative means by which we approach historical documents in general, such as the writings of the church fathers and ecumenical councils.
All that Evangelicals are doing is interpreting scripture as we would interpret other historical documents, until we have justification to do otherwise. The archives of this blog contain many examples of our asking Eastern Orthodox participants to make an objective case for their system of authority and their failure to do so. You haven't given us any reason to look to your Tradition to interpret scripture for us in the manner in which we look to Jesus or the apostle Paul to do so. Even if we assume that an interpretation of scripture given to us by Jesus or Paul wasn't derived from a grammatical-historical method, we still have reason to accept that interpretation on other grounds. The same can't be said for the interpretations derived from your Tradition.