When Moses uses the metaphor of a rock, he thinks of the connotative qualities of enduring, unchanging, solid, awesome, strong, majestic, and beautiful.
The identical actions of the Lord and the Angel of the Lord show they are the same Being. The God known by Abraham, Isaac, Jacob, and Moses was Jesus Christ.
Psalm 80 shows that the Shepherd of Israel sat between the Cherubim in the Holy of Holies, showing that Jesus Christ is the God who interacted with Israel.
Christ frequently used 3rd person titles, such as the Son of Man and the Helper. Just as Christ sent the Helper—Himself—so Yahweh sent His Angel—Himself.
Christ's return marks the beginning of the end of mankind's problems. However, His return will not be the final end, which comes when God is all in all.
When Jesus warns us not to let anyone take our crown, He encourages us to endure over the long-haul and not bask in the glory of a brief, victorious accomplishment.
In the the Third Commandment, God's name describes His character, attributes, and nature. If we bear God's name, we must reflect His image and His character.