I admit that the EVF baffles me. The pen F has the same rez EVF and a similar magnification. I don’t know the eye relief on that, however.Quite plausible - but it wouldn't have cost them to adjust dimensions and reach into their stash of A6400 viewfinders, of all things - why develop a new, inferior unit if you have perfectly working ones ready? This isn't a smart move any way you look at it.
For me, it actually simplifies things: I'll try to go hands on with the camera, but set my expectations rather low - and I'll most probably pass on it even though it first appeared to be what I hoped for; I'm not paying that kind of money for a camera that doesn't satisfy me completely; if I wanted that, I'd stick with the Sony A7 II - a good camera with some increasingly obvious weak spots (to which it is entitled, being as old as it is). By the time Sony figure out another "improvement", I'll have moved on. Sigma can speed this up, btw. - if they get around to releasing Z mount versions of their mirrorless lenses, my E/FE stuff will either get converted or sold. Still, the A7C seems special enough to make me reconsider - but a mediocre or even sub-par EVF is a show-stopper for me, especially since not everything about the camera is convincing anyway (I'm used to a different kind of I.B.I.S. by now in that class - and a full set o controls) ...