The moment we are saved, we are in Christ and He is in us. Our lives are now hidden with Christ in God. Not because of our perfection, but because of Christ's perfection on our behalf. God sees us through Christ's sinless perfection. We are safely there, hidden with Christ. In God. Think about that. Whose life can be separated from God? No one who is saved. Because their life is now hidden. One would have to go through Christ and God the Father to take that life. So actually, there IS a hidden part of us. Hid BY HIM.
Read the rest of Colossians 3. “Stop lying to one another, since you have taken off the old self with its practices and have put on the new self, which is being renewed, for knowledge, in the image of its creator.” The new self is being renewed?? Does that sound like imputation or infusion?
And I’m just stunned you seem to think (correct me if I am wrong) that there is a hidden imperfect part of us in heaven. How could anything imperfect exist in heaven, hidden or not? If heaven is perfect, then everything in heaven must be perfect.