Surely this has got to disturb long time JWs, or they are just not paying much attention.
I'll vote for the "not paying much attention".
Most JWs don't give a flying fig about doctrine. The WTS could write a study article next week bout the "truth of the trinity" and no more than 1% would leave.
JWs today are much different than they were 50, 40, or even 30 years ago.
JWs care about (in no particular order) getting to paradise to see dead grandma and pet tigers, getting the approval of their peers, getting "privileges" in the congregation so they can feel smug, and the social aspects of Kingdom Hall life.
It literally doesn't matter if the "faithful slave" is all the anointed or the 8 pudges in upstate New York, or if the 144,000 is literal or symbolic, or if birthdays are OK to celebrate or not, or if Jerusalem fell in 587 or 607 BC. They just don't care. Just give me my privileges now, and my tiger-petting paradise in the future, and the rest is just "details",