That no man may come to the Father but through Christ, does not preclude God choosing to to extend his mercy in an unprecedented way. Deny this if you wish.
Not sure I follow. I inferred from your post that you thought God could offer another plan of salvation that did not require the intercessory work of Christ, and using Him as the door. If there was another way, why would God put Jesus through the torment of the cross, one should wonder. For Acts 4:12 states "And there is salvation in no one else; for there is no other name under heaven that has been given among men by which we must be saved."
Other than your belief in the divine sovereignty of God, can you quote a scripture to support the position that the Father may choose another method of reconciliation?