A7r owner. Few things bothering me, not mentioned here. Shutter lag is horrendous. Tried messing about with it at my sisters wedding, I could not use this camera for anything with moving objects in it, the picture I'm taking and picture I thought I was taking are half a second apart! (Manual lens no AF). I've shot weddings and portraiture for 10 years, unless I can work out a solution this camera is no use for those things IMO.
Shutter button placement is moronic in the extreme, really uncomfortable to use. Should be where the front dial is.
There is no safety shift when using auto iso. I have auto iso set and in shutter priority or manual, if the light levels are too low the picture is shot dark rather than sacrificing shutter or whatever to get exposure. My canon's have this feature going back to the 5Dc and it's a life saver.
Zooming in always goes to 100% and is very laggy when panning including freezing often. I would love to be able to map the zoom button during image review to another button, the C2 button is not that accessible when holding the camera to review. I can map zoom when shooting so why can't I map zoom when reviewing?
Reviewing does not ever show the filename which is annoying when wanting to remember a certain image for later.
Huge amounts of praise for the camera too....