The AF in low light on a F2.8 lens is pretty normal. Any of the RF 1.2's would handle that without issues. Kasey is simply limited by the gear he has on hand, single lens, no CFexpress card.
The stuck pixel on a demo Camera is disappointing.
Overall I would say he is more impressed than disappointed, however I do think he has already found the Camera for him in the A7SIII which makes more sense for how he uses a Camera.
The Comments are fun to read.