I am not a fan of the NIV.
Personally, it just isn't worthy, however, there are those who need something of that level in which to rely.
Frankly, all "versions" are a work in progress.
The modern English is changing, and, although some would like to suggest otherwise, the reading level of the typical U. S. high school graduate does not reach to 12th grade. Most don't read better than 8th.
Having that level of reading comprehension, the NIV is meeting a certain need.
But, those of us educated, who desire more than the average bear, have a wealth of tools available.
For example:
Paul tells Timothy that he is "ready to be delivered." That word "delivered" is a neat word that means unyoked.
Picture the burdens of this world, the yoke of bondage the world seeks to place upon believers, the yoke of service and struggles believers persevere, and that such an unyoking by Christ takes place as He who is with us always also ushers us into His presence.
For example:
It is as finding the word calling and called are two different words in the original and how they exchange places as one reads the opening of Ephesians 4.
Such is not (imo) for the NIV readers, who generally take a more casual approach to the Scriptures
Seriously dedicated will tease out far more, and be able to present more clearly the teachings of the truth.
What does bother me is when obstinate refusal is portrayed even after very careful and precise presentation of the original language is rendered in the English.
It gets to the point that one just leaves the argument knowing that learning is not taking place, and that abiding in some comfortable scheme is more important than that of valid verifiable truth.