Absolutely agree, a mirrorles should look as a rangefinder.
Why? A camera with an EVF but no OVF is neither an SLR nor a rangefinder, so the form should best follow its actual function, not necessarily mimicking either of those film camera designs. In particular, since the EVF requires just a single rectangular viewport (as with an SLR viewfinder) not a horizontally extended, two-windowed baseline (as with a rangefinder), there is no reason for the whole top of the camera to be as high as the VF; instead it might make sense for the "shoulder" to be lower to either side of the VF port, making room for control knobs and buttons on top without them rising above the height of the VF port.
It is a mistake to think that the "mock-SLR" styling forces the EVF to be any higher; instead the EVF can sit immediately above the rear screen and be no higher than the EFV in a flat-top "mock-rangefinder" styling, but with the regions to either side lower.
There is then the questions of where to put the EVF: central or to one side?
- Film SLRs must have the VF rather central; over the middle of the film gate;
- Digital SLRs must have the VF somewhat central; over the sensor, but with latitude to have the sensor somewhat off-center
- rangefinders probably must have the VF port at one edge, to allow for a long enough baseline;
- EVF cameras have no such constraints, so mimicking film camera designs is not a good basis for making this decision.
(I would like a mirror-less camera with an EVF hump at the left end and a long, lower shoulder to its right, but no camera maker seems to agree with me!)
P. S. I notice that I already said roughly the same thing very early in this long-lived thread, many months ago; sorry for the repetition. (At least I am consistent!)