I'd suggest getting the lens serviced. My guess is that there is something mechanically wrong with the lens, or there is oil on the aperture blades, that is preventing them from closing during exposure.
G7 has indeed been cancelled. The issue, as speculated here, is the front - back depth of the hand grip. The thick grip would have moved the N85 Port mount forward, affecting compatibility with all of the micro four thirds lenses supported, and necessitating a port system dedicated to the G7 housing.
GX8 is no problem, and that high priority design is moving forward.
The diving looks amazing, and the housing feedback here is interesting.
What is the water temp?
A7 definitely isn't the top choice for video shooting, but it is serviceable. A7S is outstanding.
Sony has a 16-35 f/4 lens in the FE (full frame E-) mount that has been available for a few months, and works well in the 180mm glass dome. This is actually one of the best wide rectilinear zooms I've used, and I am really impressed by the performance in the relatively small dome. FF systems from Canon or Nikon typically require something much bigger...
I really like Sony's strategy with the "purpose" built models that use the same lenses, and go in the same housing. A7, A7R, and A7S all use one housing, A7 II and (fingers crossed) A7R II should use another. This allows me to have high resolution (A7R) and highly sensitive (A7S) bodies that I can use interchangeably, as needed, in one housing. These have been my primary two travel cameras, using A7S for video and at night, and it has made flash obsolete.
I've sent you a PM, but it would be good to get a bit more info on the age of this system. There was a known issue that caused something like this with some early handles. It was corrected, dealer stock was replaced in those cases. If this is that problem, it looks like yours was missed.
It is normal for the handles to have a bit of flex in them, which some people don't enjoy, and is amplified with heavy strobes or video lights. The handle bracket has been added as an optional install to knock that out.
Moses, I wouldn't worry about the strengths of those the handle bolt attachment. They brackets are optional, and something like 20 models used this tray prior to their being added.
Handle brackets were never offered for E-M5. The mounting holes you see on the right grip are for an accessory hand strap, not a bracket. I'm confident that once you get a current handle this won't happen again.
Thomas Lam from Nauticam deserves a lot of credit for taking the time to actually measure these (and basically every other lens on the market). The measurements were actually done twice by Thomas, and verified by Alan Dewey at Reef Photo.
The CMC magnification table listed in the press release is actual measured data, in water.
Working distance is measured from the front of the housing port, or front of accessory lens. It is the actual space between the underwater system and subject.
All of the systems listed achieved their best "native" magnification at their widest focal length, and very close to the subject.
All of the systems listed achieved the magnifications listed with CMC are at full telephoto. It is possible, but not likely that some of these could actually have slightly better magnification if you pulled the zoom back a couple of clicks. In the interest of consistency we didn't try to establish these situations. We wanted repeatable results.
CMC isn't just a simple diopter, so I'm going to try to resist those comparisons. The actual end magnification with today's top compacts (RX100m3, G7X, and LX100) was in line with simple housed +15 diopter macro lenses. There were noticeable image quality differences, though.
One idea would be to skip manual focus and go with the much less expensive FP-120 port... Autofocus combined back focus driven "lock & rock" techniques is preferred by many users of these systems.
You could add a focus gear from XIT404 at some point in the future should you determine that actual gear driven focus is needed Some prefer the ergonomics of this solution too, driven from the knob on the housing instead of the port.