I'm curious... you claim that "the eleventh hour" means "just before destruction in the KJV". Please explain this assertion, since the phrase "the eleventh hour" appears only in this parable. Nowhere in Scripture is it stated that "eleven" means "just before destruction" - in any translation (nor do either of your other numerical meanings appear in Scripture).
Did the four squads of soldiers guarding Paul in Acts 12 represent God's creative work?
Did the number of David's sons (nine) in 1 Chronicles 3 represent finality of judgment?
Did the eleven days' journey in Deuteronomy 1 allude to "total destruction"?
Numbers may represent something more, and they may not. It's an error of hermeneutics to assume that every number has a specific meaning in every passage in which it appears; that just leads to unsupported interpretations like the one you have for the Matthew parable. Using such an interpretation as reason to deride the NIV (especially when it isn't even under discussion) is quite unnecessary.
Numbers in scripture can be understood in the Holy Bible by wisely noting how God uses them without contradiction throughout the whole bible.
This kind of understanding is not discovered in modern bibles due to the distortions of word usage in them.
There are no such distortions in the Holy Bible as any competent user of word search of the Holy Bible can verify for themselves.
I have not yet searched out the meaning of the numbers nine and eleven so I can't show the meaning they have in accordance with God's consistent use of them.
All words in the Holy Bible have consistent meaning and use by God in his book of the scriptures.
You can misapply use of numbers if you fail to seperate the numerical use of them by man as opposed to God's use of numbers. It isn't significant to note tallies that aren't contextually related to understanding narratives that God provides. However, when God ordains a thing such as his ordering of creation, or how Jesus makes use of a number, for example, then it is notable that God uses numbers and words precisely and doesn't deviate lest confusion arise in the minds of them that are weak in faith concerning his written word.
And, words can have a complex set of meaning.
The number four refers to "the world" on earth.
Thus, the four rivers that supplied the water to world on earth in the beginning..
The four seasons of the world.
The four cardinal directions of the world.
Six refers to man on earth.
Seven refers to completed work of God.
Eight refers to eternal.
etc.
Once you grasp the significance of a number as God signifies by his use of it, then insight is given.
For example, the six stone water pots at Cana signify God filling a man that is first emptied and cleansed of all former contents and then filled with the word of God to the brim. After which, if a man's heart is filled, the miracle of new life occurs.
For example, when we read of the four horses in Revelation we can understand that they are the four world wide movements that reveal the global attack of Satan in the end of days by means of global governance.
The four legs of the horses referring to the global extent of each rider's governance to the four corners of the earth.
The above is but a few examples.