I found online a brief article by a non-JW Christian with degrees in religion, biblical studies, and theology who has written a book which reviews the 2013 NWT and the web page gives a link to his book. [The article promotes his book and his book is called REVIEWING
2013 New World Translation of Jehovah's Witnesses: Examining the
History of the Watchtower Translation and the Latest Revision. He says he is the "Chief Translator of the Updated American Standard Version".] For a non-JW author of numerous Christian books and articles he says surprisingly good things about the 2013 NWT and of the JW religion, but he also says two things about the NWT which weaken my temptation to obtain a copy of the 2013 NWT. The following are some of the things he says at https://christianpublishinghouse.co/2016/11/08/review-of-2013-revision-of-the-jehovahs-witnesses-new-world-translation/ (the boldface is mine).
"The 2013 New World Translation (NWT) is nothing like the 1984 New World
Translation Reference Bible. Yes, the same theological bias exists.
However, setting aside the theologically biased verses (e.g., according
to Orthodoxy John 1:1, 8:58, Acts 20:28; Rom. 9:5; Titus 2:13
to mention just a few), 2013 is a more accurate translation by far in
comparison to the 1984 edition. However, 2013 is a dynamic equivalent
(interpretative) translation like the New Revised Standard Version or
the New International Version, even on the levels of the Today’s English
Version at times, while the 1984 NWT reference Bible was more literal
by far and written on an 11th-12th-grade level. The 2013 NWT is written
on a 6th-7th-grade level.
The 2013 year of the Jehovah’s Witnesses was the biggest since 1914.
While they made many doctrinal adjustments in 2013, it is their 2013
revision of their New World Translation of the Holy Scriptures that was
most shocking, to both Witnesses and non-Witnesses alike.
... This review is unbiased, frank, and very honest. Most Christians see the Jehovah’s Witnesses as a cult, which they are not. David Koresh, Charles Manson, Jim Jones and Jonestown,
these were cults. Anything one can blame the Jehovah’s Witnesses for,
so-called orthodox Christians have done as well, even more so in many
cases, be it setting false dates, theological bias in translation,
costing Christians their lives because of false beliefs, believing that
they are the one true religion, mind control, and being biblically
wrong. ... In my studies of their history, their translations, I can say, if you
set aside the handful of theologically biased verses, the 2013 NWT is
not much different than the NIV. Moreover, their study notes (original
language terms, Bible background, historical setting, archaeology,
textual issues), are actually very good."