The articles to which you appeal are misleading, biased, and inaccurate.Trintian Bible Society have some other articles about why to not use the New King James Bible, and its not a King James Bible.
The NKJV is a genuine revision of the KJV in the same sense (univocally) as the KJV is a genuine revision of the Bishops' Bible. The first rule for the making of the KJV stated: “The ordinary Bible read in the church, commonly called the Bishops’ Bible, to be followed, and as little altered as the original will permit.” The KJV translators were given unbound copies of the 1602 edition of the Bishops' Bible as their starting point in English. Even though the KJV was officially a revision of the Bishops' Bible, it could also borrow renderings from other pre-1611 English Bibles and still be a revision of the Bishops'. It even borrowed many renderings from the 1582 Rheims NT.
When all the relevant evidence is justly acknowledged and evaluated, the NKJV can properly and accurately be considered a revision of the KJV in the same sense (univocally) or after the same fashion that the KJV was a revision of the pre-1611 English Bibles such as the Geneva Bible or the Bishops’ Bible. Just as the KJV is considered a revision of Tyndale, the NKJV could also be. Many actual verifiable facts would clearly demonstrate that the KJV translators made the same-type changes or revisions to the pre-1611 English Bibles that NKJV translators made to the KJV. All the many changes that the KJV translators made to the pre-1611 English Bibles are not entirely different than the changes that the NKJV translators made to the KJV. The KJV was not merely a slight or minor revision of the pre-1611 English Bibles as verifiable facts from those Bibles would demonstrate. The KJV translators even made some textual changes or revisions to the pre-1611 English Bibles of which the KJV is a revision. The KJV could be considered as much an extensive revision of the trusted Geneva Bible and of the Bishops’ Bible as the NKJV is of the KJV. Hundreds and even thousands of differences could be noted between the Geneva Bible and the KJV, and yet KJV-only authors have claimed that they are “basically the same” Bibles. The makers of the KJV were Bible revisers of the pre-1611 English Bible just as the makers of the NKJV were Bible revisers of the 1611 KJV. The KJV and the NKJV can soundly and justly be considered to be as much “basically the same” Bibles as the Geneva Bible and the KJV are considered to be. If the Geneva Bible and the KJV can properly be considered “practically identical,” the KJV and the NKJV could also be considered the same. The NKJV can soundly and accurately be regarded as a genuine revision of the KJV in the same sense as the KJV is a genuine revision of the Geneva Bible or the Bishops’ Bible. In many places where the NKJV differs a little from the KJV, it is in agreement with the 1560 Geneva Bible or another pre-1611 English Bible.