I find the cross-eyed look in the picture above pretty much sums up how nonoptimal getting detailed composition, exposure and focus right without a decent EVF or OVF is.
In any position without eye strain, the LCD or OLED screen is going to be a small part of your FOV compared to immersing one eye in the entire scene from edge-to-edge of vision with an EVF/OVF and retaining normal if optically induced focus relief. Plus you don't need to keep your arms stretched in front of you for additional upperback and arm strain.
The great thing about the rangefinder style viewfinder placement is that you nose doesn't get in the way and your other eye naturally has an unobstructed view of the same scene. This is probably old hat to most on the forum, but if you haven't tried it before, you owe to your eyes to try this old school method correctly. Ideally, start with the VF on the right eye like you see in the Leica, and more recently in the Fuji ads.
Open both eyes, and let your cortical cells readjust to overlaying the scene through both eyes (one natural view and the other through the viewfinder) until they merge. Now you have the equivalent of a fighter jet's HUD display overlayed on you FOV. All the details are going to be there up to the limit of your vision if you have a high quality EVF or OVF. This is ideal for wide and normal or near normal telephoto lenses, for me, it seems to be harder to do with a long telephoto.
I was whale watching from Goat Rock Beach a couple weekends ago and could not have stood there for an hour or more scanning for broaching humpbacks and then getting focus and composition right for fleeting shots without this technique.
It would be interesting to know if others do this as well, and if you have any additional tips? The general rule seems to be that you should learn which is your dominant eye and then set up the viewing window in a position in front of it that allows the scenes from both eyes to merge (most firearm instructors can walk you through that in a minute or two, since this is how it works with sighting a weapon without squinting one eye and losing your peripheral vision).
I attached a picture of my reflection with the OMD in the closest equivalent position to what I do much more efficiently with my X20 (same position works for X100s, XPro, Leica M, etc.). Since the center mounted EVF is not ideal, I find myself longing for the Fuji camera whenever it is not with me.