Interesting subject.
Since the Gilead School has been changed (ie no longer trains missionaries) maybe it is not a surprise that some of the instructors were reassigned And we are reading too much into it.
Concerning the new NWT, so far I haven't seen any evidence of Greek or Hebrew scholarship. I could duplicate everything they have done with standard reference books like Strong's and a Lexicon, coupled with a dozen or so other recent translations like the NASB.