We were? You were alive in 70ad?
And we who are alive are caught up with them to meet the Lord in the air.
1 Thessalonians 4:17 KJV — Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
So, how are we already changed, when we aren't yet caught up?
The biggest problem I see with your theology is that there is no actual resurrection like Jesus experienced. And if there is no resurrection, our faith is vain--there's no point to it. You can pretend that people were whole in Hades, but they weren't--because they didn't have bodies. And Peter explicitly tells us that we can know that David was still dead and buried, because his bones were still in the sepulchre. Peter and Paul were both expecting a physical resurrection, and were still hopeful of such. You've taken away their hope.
EDITED, I quoted a couple of incorrect verses.
Paul in Hebrews 9:8,26,28 is first speaking about Heaven [Holiest of all] then the physical temple in Jerusalem [First Tabernacle, Mosaic Age] then he speaking about heaven again. Then he speaks about Christ dying on the cross during end of the world [age] and will appear a second time for salvation which is the Parousia A.D 70. Hebrews 9:28 and 1 Thessalonians 4:15-17 are the same event.
The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing:
For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us:
but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.
Hebrews 9:8,26,28
No one has ascended into heaven.
No one has ascended to heaven but He who came down from heaven, that is, the Son of Man who is in heaven. John 3:13
For as in Adam all die, even so in Christ shall all be made alive.
But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming. 1 Corinthians 15:22-23 [Hebrews 9:8,28; 1 Thessalonians 4:16]
For in the resurrection they neither marry nor are given in marriage, but are like angels of God in heaven. Matthew 22:30
Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; nor does corruption inherit incorruption. 1 Corinthians 15:50
And the dead in Christ will rise first. 1 Thessalonians 4:16 [Hebrews 9:8, 28 raised from Hadean Paradise]
Everything was fulfilled in A.D.70:
and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished. Daniel 12:7
For these are the days of vengeance, that all things which are written may be fulfilled. Luke 21:22
that the blood of all the prophets which was shed from the foundation of the world may be required of this generation,
from the blood of Abel to the blood of Zechariah who perished between the altar and the temple. Yes, I say to you, it shall be required of this generation. Luke 11:50-51
“Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. For assuredly, I say to you, till heaven and earth pass away, one jot or one tittle will by no means pass from the law till all is fulfilled. Matthew 5:17-18 [Hebrews 9:8,28; 8:13]
Assuredly, I say to you, all these things will come upon this generation. Matthew 23:36
Assuredly, I say to you, this generation will by no means pass away till all these things take place. Matthew 24:34
For whoever is ashamed of Me and My words in this adulterous and sinful generation, of him the Son of Man also will be ashamed when He comes in the glory of His Father with the holy angels.” Mark 8:38
Assuredly, I say to you, this generation will by no means pass away till all things take place. Luke 21:32
For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works. Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom. Matthew 16:27-28
For whosoever shall be ashamed of me and of my words, of him shall the Son of man be ashamed, when he shall come in his own glory, and in his Father's, and of the holy angels. But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God. Luke 9:26-27
Paul didn't believe in a physical resurrection.