Paul says changed. Not made better.
When you change clothes you do not put the same ones back on. At least not immediately. Nor do you stand naked waiting for them to be cleaned. That is not changing clothes. That is just waiting for the same clothes. There is a big difference in change and waiting for the old. Paul did not say we will wait for the end to get the same old flesh. Nor did he say the old flesh can go to heaven period. Paul claims an incorruptible body, a change, a new body, immediately with the Lord at physical death.
Changing my clothes has nothing to do with Spiritual Inderstanding.
A person receives a new "spirit", a new "body" ... NOT BY getting RID of the OLD, but by the CHANGES "MADE" to the OLD, to "MAKE" the OLD, have NEW attributes.
Every human has a Natural spirit. It is NOT some ghostly thing floating around.
A man's Natural "spirit", is simply his "Natural TRUTH" in his Heart...(regardless of the true / False/ deceptive things his MIND thinks up).
The Baptism of the Holy Spirit Effects the "Natural spirit of man", Giving that man's "Natural spirit (a circumcision of his Heart)," cutting off his OLD Natural Truth About Spiritual things, and God planting His SEED, with His Spiritual Truth, bring to Life, a Man's Born "AGAIN" Spirit...with Gods "Spirit if "HIS" Truth.
The Saving of the soul,is About "Restoration".
Same soul, but Restored to its "Goodness", as it was when God Blew into a man's nostrils.
The Same Body that A man is Naturally Born with, is the Same Body that shall be Raised...
Changed, without Blood Life, disease, cells that replicate and die, deformities, a Mind with evil or wicked ideas or intents, sorrow over bad memories, loss of loved ones etc.
Also the New Heavens and New Earth...are "NOT a destruction/ complete Riddence of the OLD.
The Earth shall be destroyed...yet this is a world without end.
Everything Changed, are changes, A man has never Seen or experienced...so for man, it shall be completely New...yet it is The OLD that always Was, we have not yet experience the complete New.
Nothing new under the sun, but plenty we have not Yet seen.
...body's, do NOT "GO TO" Heaven.
Currently there is a Division between Earth and Heaven. (Water).
The DIVISION will be Opened. A Heaven on Earth scenario, that one can only imagine, 'till it come into fruition.