Just to directly answer your questions:
I reject the NKJV because:
- It is falsely marketed as a minimal language update to the KJV,
- It introduces readings that are against the KJV and that agree with other modern versions I have already rejected,
- It drops the distinction between singular and plural pronouns; distinctions God inspired in his word and therefor must be retained in the Bible.
- I don't need an update to my KJV anyway.