I feel like the Blackmagic Ursa Mini will be the go-to camera for us. I prefer having the ability to shoot stills with the same camera we shoot motion picture with. But the thing is that we can certainly grab 4K stills off the Ursa if we have to but the global shutter is kinda a big deal.
Of course you need to spend the extra $1500 for the eyepiece. And there's a lot of fiddly pieces you need to get the signal up on a monitor. And power supplies. And of course a decent lens set. I really want an f2.0 (or so) lens which goes from about the motion-picture equivalent of a 35 to an 85mm lens (which as far as I know does not actually exist). I want a zoom because I fear changing lenses out in blowing sand (and I feel that much of my shooting will be out in blowing sand.) But unless the Panasonic GH5 comes with global shutter, I think that's just the way it's gonna be.