Is the wages of sin our natural death?

Does anyone else believe that our natural deaths are not the punishment for sin? Id always thought it odd that if our natural deaths were the punishment for sin, then why would God raise everyone for judgment Hebs 9:27 resulting in some dying again? Rev 20:6,13-15. Especially as we're told that God takes no pleasure in the death of the wicked, Ezekiel 18:23,32. Maybe Adam and Eve were created mortal? It's been suggested that Adam and Eve did not receive the immediate punishment for their sin ("in the day that you eat of it you shall surely die") because God killed an animal/animals instead, and covered them with the skins to show that their sin had been 'covered'. So according to this idea, their nature did not fall but remained the same. However the thing that did change was their relationship with God and from then on the Devil was their master, as they had chosen him over God - and he has had sway as "the ruler of this world" (John 12:31; 16:11) ever since. It is true I believe, that the Bible does not say that Adam and Eves nature 'fell', or refer to human nature as having 'fallen'. I could say more. But I'd like to hear thought through comments on what I've already said. I'm no longer certain of what I believe, myself! I'm looking for answers to consider.