A benefit that can never be under estimated about "Live view" cameras (mirrorless or the odd mirrored camera that can function well this way), is removing the guess work of exposure compensation.
The image below was taken late evening in that period where you start to mistrust your own eyes, but before full darkness. For an SLR shooter, even with a state of the art light meter, getting the exposure somewhere between "as seen" and "as wanted" is tricky, requiring lots of experience. Imagine doing this in the film era!
With a "What You See Is What You Get" camera, it is simply a matter of setting for taste based on what you see.
The most important setting control on my EM5's is the exposure compensation control that I have switched to the back thumb dial. The Pen, to it's credit does not seem to need as much adjustment, which is good as the control is far too stiff and frustratingly cannot be moved.
Oddly, when I use an SLR camera, I am now keener to use exposure compensation, as I know the benefit. Getting used to setting it though without seeing the effect is unsettling and to my mind pointless in this day and age. Ansel Adams would have used any tool at his disposal, even digital, so why shouldn't we.
Incidentally, this is also an area the EM5 shines, both technically and artistically.