I want to first state that I am going to be ordering this camera! Sony gets my money so that talks more than anything.
I have some complaints, and complaints about complaints : ).
I'm going to be using this camera off the grid for months (read http://staywildandtr...03/30/cdt-gear/ for information on weight). Every gram counts, and it's a shame they keep making these cameras heavier and heavier! They're getting as heavy as a DSLR, but you cannot use them like a work-horse DSLR because no dual card slot. Cards don't fail often, but when they do, and you charge $10k for a wedding, it sucks to lose it all. Even if your terms state you can't be sued more than the money you charge (roughly $10k in this case), it's still annoying.
Weight on the breaking point of being too heavy
Battery (old fashioned lithium-ion, they could at least design a new 2,000mah battery in the same size case)
No true 14bit uncompressed raw (I'm sure they'd have advertised it if it existed). If bandwidth is an issue, they could give you the option of a 1FPS instead of 5FPS mode. This would be great for landscapes.
No dual card slots or the option for redundancy (even if it used the USB port to write to a separate card reader, that'd be something)
Bigger. Both cameras are uncomfortable to me (I have large hands) and I found the previous model slightly more comfortable.
Price. Sony does what it always does and it's upsetting to know that it'll be nearly half the price in a years time. I know digital cameras are destined to be this way but sony pricing scheme has always been more annoying than other companies.
Lenses. FE lenses are sealed, no gasket. Some zeiss lenses either have a gasket and no sealing, or sealing and no gasket. I'd rather they just had sealing and a gasket, like canon lenses.
Sealing. Sony sealing usually always sucks and I doubt this is going to be different.
Shutter shock problem hopefully resolved. Though I have a small complaint... I emailed sony a while back, they claimed the a7r has had NO reported problems and there's "no vibration". Either they were lying then and they improved the shutter, or they are lying now and it uses the same shutter as before. I just don't like when companies lie that's all.
No onboard GPS. I used to think onboard GPS was essential but there's so many better ways to do it and lightroom makes it easy. If I have to turn the camera off every time I take a photograph to conserve battery life, I don't want to wait for a GPS signal. GPS could be turned off if it existed but it's more complications and there's better trackers available.
No onboard flash. They get water in, begin to rust, are useless at providing high quality light (light source is too small and not powerful enough) and are an archaic method of triggering a flash (radio flash options are much superior). It is sad when a review gives a camera less points for not having such a feature.
Those that complain about a lack of onboard flash and GPS, really need to research more. There are far better options available.
To keep things fair, I've made an extensive list of another camera to compare it to. The generic DSLR. This part is a bit of a joke.
Heavy. Doesn't get taken anywhere because it's too heavy.
Large. Doesn't usually get taken anywhere because it's too big and poses are ruined because people are intimidated by how big it is.
Mirror that becomes slightly misaligned when dropped or jolted.
Can make dust mountains because it stays at home and doesn't get used.
Doesn't get used so it holds its price more.
Can I crop the video mode beyond crop mode? It'd be nice to "digitally zoom" beyond "crop mode" to gain effective reach.
None of these things are a deal breaker for me. The camera looks great and I'll work around the issues it'll likely have. Sony always do the odd little dumb thing with their cameras but I like the size in general