To me, the term "positional" is something that has been added by theologians to explain a particular view that I used to hold myself, but that I no longer think is biblical.
As examples of what I mean, Peter did not say that we have been positionally "born again of incorruptible seed" (1 Peter 1:23) or that we've positionally become "partakers of the divine nature" (2 Peter 1:4). Paul didn't say that we've been positionally made a new creation (2 Cor 5:17). He didn't say we've been made positionally holy (various references that refer to us as holy). He didn't use the word, nor imply, that we have been made positionally righteous (again, several references). He said we have become the righteousness of God in Christ Jesus. He didn't say that we're positionally "one spirit" with God (1 Cor 6:17).
The writer of Hebrews didn't say nor imply that we have been positionally perfected forever. He didn't say that our sin has been positionally taken away and positionally cleansed by the blood of Jesus. He didn't say "by that will we have been positionally sanctified through the offering of the body of Jesus Christ once for all" (Heb 10:10).
I've had to add the word "positionally" to all of those verses, because none of them state nor imply that it's positional. As I read these verses, and the surrounding contexts and overall points that Paul, Peter, etc, are making, these things appear to be literal realities.
If you look at the make-up of man as spirit, soul and body, it's easy to understand that these things are realities in our spirits. Our bodies have obviously not been "born again" or made "new creations" or become "righteous" or "sanctified" or "one spirit" with God. Our souls (mind, will, emotions) have obviously not been "perfected forever" or made "holy" or "become partakers of the divine nature." But in our spirit - which is the essence of who we truly are - all of these things have become a literal reality. We have literally (not positionally) been "perfected forever" in our spirits, which have become one spirit with God.
We're not lowly sinners who happen to have been made positionally right with God. In all reality, "righteousness" and "new creation" (etc) is who we truly are!