I haven’t had any issues with my A7R2, on the whole - many, many models processed, and only a few show the texture issue that Yegor is talking about. That said, it is definitely present in a number of models.
It could be that the A7R2 is very sensitive to blur since it is such a high MP count… photography conditions that would give a clear, crisp photo with a smaller sensor do exhibit some blur on the R2… the image resolution is just huge.