Arguments against the NKJV always come off as extremely petty, in my opinion. Since a problem can't really be found with the text (particularly of the NT), it focuses on who was involved in it, or marginal notes. Marginal notes!! (as a side note of my own, that article against the NKJV is one of the worst "scholarly" articles TBS hosts).
Not all the KJV translators were upstanding men, and the KJV also had similar marginal notes giving textual variants, but apparently that's only a problem for translations other than the KJV. If, like the KJV, these marginal notes were excised from the NKJV, would the opinion of the NKJV change? Of course not. The standard is so biased it's stunning.