I'm not sure.
What I mean by that is that the issue is not cut and dry. It depends what you consider the essence of the NIV to be.
Some helpful links come from the NIV Bible Update website and Zondervan's blog.
These sites explain how they are updating the NIV version of the Bible.
I believe the question comes down to whether the updates will cause the same issues to resurface that the TNIV brought. I am in a wait and see attitude.