Similar experience
Greg,
I also had this for a couple of weeks. I feel like an idiot for half-believing some of the Sony basher critics, especially about low light at weddings.
This weekend I attended a friend's wedding as a guest. There was a team of four wedding photographers, two still shooters and two video shooters. The still guys each had two D4s, one on the belt and one in the hand. Mounted were heavy Nikon 24-70 and Nikon 70-200 f2.8 (relatively slow) zoom lenses. To add to the weight, each camera had a pocket wizards strapped to the SB900 flash. In the church, they sounded like machine guns with their loud shutter chattering.
In contrast, I had a Sony A7rII with a Sony 28mm f2 and a 85mm f1.8 in my pocket. I shot in silent mode from the audience in the church and electronic front shutter elsewhere. I didn't need heavy zoom lenses, because with 3X pixels, I could crop in Lightroom and do the same thing. The rehearsal dinner was in a darkened restaurant, so I carried a small flash in my pocket with a tiny Yongnu rf trigger to light the room.
I had no problem focusing in any kind of light-- contrary to reports from some. A recent report by Rishi on DPREVIEW gives hints about how to make the AF fast on A7rII.
Some of the photos are on my dropbox page:
https://www.dropbox.com/sh/i4sjn560dr147c7/AACFaYWawXgZRA-dLFE-Xgbfa?dl=0
I processed in my laptop using Lightroom CC, but didn't always get white balance right because of the mixed lighting and the poor screen on my laptop. Note I also pp'd in Portrait Professional 12.5 for some of the closeup shots of ladies.
==Doug