A few have alluded to this already, but in my opinion, whether he was right or wrong, if the investigation results in the captain getting shafted, (as some are saying he already has been) as the result of the diversion, what's really going to interesting is the attitude of some (stress 'some') of the blue rinse UA FAs with 'attitoode' to any command they don't like from any captain in the future.
I think the most insightful post in all 17 pages of this thread was Judd's - a flight attendant.