Wayne,
If you really want to be fair please take into account the historical context of what you are comparing, especially the KJV and the NWT.
What you blame the KJV for mostly depends on the only NT textual basis available when it was produced, i.e. Erasmus and Stephanus' versions of the textus receptus which was essentially based on late Byzantine copies for the lack of anything earlier.
The NWT, on the other hand, is a mid-20th-century work which admittedly benefits from over one century of early manuscript discoveries and subsequent modern textual criticism (Tischendorf, Westcott & Hort). It is best compared, not to the KJV, but to other 20th-century Bibles.
From this perspective, it quickly appears that the questionable renderings of the NWT do not stem from lack of data but from definite theological bias. Simply put, they are deliberate, not accidental.
Theological bias are certainly not unique to the NWT among modern Bibles. There is also a minoritary KJV-only movement in fundamentalistic Protestantism which stubbornly chooses 16th-17th-century ignorance against modern scholarship. If your criticism is aimed at that I agree with it in principle. But if you believe that serious Catholic or Protestant scholarship is sneakingly departing from the KJV because of JWs and the NWT, as several of your posts suggest, you have your facts ass-backwards.