The facts are Mary Believed, Mary was highly favoured, Mary was willing to serve the Lord in the manner the angel conveyed...AND the Lord was WITH her and the Spirit of the Lord Came UPON her.
You say she was completely, perfectly endowed with grace....
So?
You say Kecharitomene is a Title given Mary...
So?
It is NOT a BIG SECRET, it was a ONE TiME spectacular and miraculous event for the Lord to come forth OUT from God IN HeAVEN and enter Mary's Womb and then come forth OUT (in the FLESH) from a Human womans WOMB.
It is NOT a BIG SECRET, people in the OT believed, and were Willing to serve the Lord according to the manner He desired, the Lord was WITH them and the Spirit of Lord was UPON Them.
It is NOT a BIG SECRET, Jesus FORETOLD of the 'INDWELLING" Holy Spirit that WOULD come "AFTER" He departed "this world" and "returned to Heaven".
AFTER Jesus 'ASCENDED' Back UP to "Heaven", a Large gathering took place In Jerusalem, ON The Day of Pentecost...the Disciples, Mary, other believers all gathered TOGETHER Received the "INDWELLING" Holy Spirit, just as Jesus had foretold.
While you emphasize Mary being "perfectly endowed with Grace"....Jesus emphasized a persons "Conversion" and Receiving of the Indwelling of Holy Spirit...as to that WHICH is the Paramount Act of God, for a person to become made WHOLE, Free from Sin, and Forever Alive IN Christ....
And much as you TRY to make that apply to Mary, BEFORE Jesus' Ascension...THAT IS NOT WHAT SCRIPTURE TEACHES.
Acts 1
Acts 2
Glory to God,
Taken