The changes are pretty innocuous - mostly update to names of meetings & publications.
Of course, that doesn't mean that future changes would be equally insignificant.
What seems interesting to me is that the book was released in mid-2014, and the format of the midweek meeting changed in 2016 - just 1-1/2 years later.
According to Splane in the September broadcast, changes like that are years, maybe even a decade or more, in the making. So, based on Splane's explanation, they must have already been planning the meeting change when the book was being written.
So apparently they went to all the bother of printing & distributing millions of copies of a book that they knew, in advance, would have big chunks of obsolete text in a matter of 18 months or so.
Not sure what the solution would have been, but that seems pretty wasteful.