Changes like that are hard to measure.
Changes in sentiment can be hard to measure, but changes in posting behavior seems incredibly easy to measure.
The people barking are actually the least worrisome, they’re highly engaged. The meat of your users say nothing and are only visible in-house.
That said, they also don’t give a shit about most of this. They want their content and they want it now. I am very confident spez knows exactly what he’s talking about.