So, if I am understanding you correctly, Christ's atonement was not needed to overcome physical death even though God chose Christ to overcome physical death. It could have been, according to you, someone else if God chose it, and therefore, when I read Romans, according to you, the fact that it was Christ that God chose to overcome physical death, I should not in any way use this information to understand Romans because it is an insignificant tidbit of information that really doesn't matter when understanding scripture. In otherwords, even though Christ was chosen to overcome physical death, because it could have been anybody, I should not to any degree use this as part of my understsanding (that it was Christ who overcame physical death) when interpretting scripture and strickly think of Christ overcoming spiritual death only as the other part is insignificant as it could have been anybody? (God being omnipotent, so Christ's role in this is insignificant.) Is this what you are saying?You interpret Romans NOT CONTEXTUALLY, but through the alien foreign lens of Mormon doctrine. Romans is teaching something radically different than what you think.
Christ's atonement negated spiritual , yes. Because Christ lives, we shall live too, hence He is the "firstfruit of resurrection".
What you're not understanding is that from a CAUSAL standpoint, God the Father is more than able to resurrect anyone at anytime.
God chose that Christ should overcome physical on our behalf, but I'm speaking from a different viewpoint regarding God's own OMNIPOTENCE.
Got it now?