I picked up a Sony A7II for the very first time at my local Best Buy & realized how ergonomically bad it is. I guess my hands are too big & I'm so used to the Pentax K-50 & Nikon D7200. My fingers felt squished between the grip & the lens. The body feels really cramped.
Then I moved over a few cameras & picked up a Panasonic G7. Even though it's smaller, it feels much more ergonomically comfortable. Same thing with the Olympus OMD E-M1 & E-M5 II bodies that I have used.
I was considering the A7III as a possible system switch & entry point into the E-mount system if the K-3II replacement turned out to be a dud, but I don't know if I could ever get used to the A7 ergonomics. It seems like they are making leaps & bounds progress in AF, image quality, & video, but ergonomics seems more like an after thought to the Sony designers. The weather sealing issue doesn't really bother me, though.
I guess I'll try out the A7III when they finally put it on display. I have a pretty strong feeling that It's going to feel very similar to the A7II. I tell you that if it's not one thing, it ends up being another. Hahaha!