Great post !! We agree on many principals. Always remember this . David broke all Ten Commandments. God still loved him but he never went to Heaven because he didn’t have Christ.
Before the Blood of Christ paid the sin price, people went to a holding place waiting for Christ to come. The Bible called it the Bosom of Abraham. After Christ came, "to be absent from the body is to be present with the Lord. Our spirit is with Him right NOW if we are saved.
Eph 2:6 and raised us up together, and made us sit together in the heavenly places in Christ Jesus,
We are sitting together, right now, at the right hand of the Father. Our spirit is with Jesus. Our bodies will die and we will get a resurrected body. A resurrected body is NOT just us being made alive like Lazarus was. The new body will be like Jesus'. It will be eternal and incorruptible. It won't even look like us. When Jesus exited the tomb, Mary thought He was the gardener. 2 disciples walked with Him for 7 miles and didn't know they were talking to Him until they saw his scars. He kept His scars to glorify Himself. BTW, the "mansions" mentioned by Jesus do NOT refer to a house. We don't need a house. There will be no more sleep. Peter called his body a tent. Many have called their bodies a "house" tabernacle, or a temple. The bodies we have are just containers for who we really are, ergo the parables about the potter and the clay. Adam was made from clay. God breathed into the clay to make it a living soul. Calling our new resurrected bodies a "mansion" tells us how far it will be from a "tent" in Heaven.
So our spirit is saved, our bodies will be renewed, the only thing left will be our souls. That's why we call it "saving souls". Our spirit's were dead until we received the Holy Spirit and they were resurrected to go to the Body of Christ. Our Bodies will be resurrected at the sound of the Last Trump. Our souls will be judged after that to see how close we have transformed our minds as a living sacrifice. When our spirits died at the Fall, we began to live by our souls. Our soul tells us to eat if we are hungry, to steal if we want something, to kill if we hate someone, fornicate, ect. The object here for sanctification is to suppress our souls to our new Spirit. People need to see less of me and more of Jesus.
People in the OT went to heaven just as we did, but they had to wait for the price for sin to be paid.