I find all those fancy EVF features are mainly very detracting in my opinion. I got to see them and frankly you put the camera down and then almost blindly compose from what you see. The grid lines and a few AF point triangles is the most I am prepared to put up in the main viewfinder view. I don't mind all the useful text underneath as it is outside of the view.
I would want the AF to do the work, not fancy zoom in, and I think eye AF is a little bit of a gimmick.
I think all those features are great if the EVF is mirrored to ipad or at least larger smartphone for sure.
Histogram is sort of over the top for EVF. unless they really shrunk it down in the corner. As far as my Canon is concerned, post-capture histogram is enough, but I would like to see the actual histogram for the whole image, not JPEG thumbnail!!!! This is next to useless.
There is no reason why you should rely entirely on shutter for very fast capture or any capture at all. Once the global shutter is in, the mechanical one only becomes a protective feature which would quickly disappear or simplify.
In fact with the dual mode camera you can lift up the mirror and shoot like mirrorless with dual pixel AF support looking through EVF while still retaining all standard dSLR functionality and features.
Of course the EVFs will get even bigger and better. And they need to. One day there will be no more need for mirror. But not yet.