Personally, I think the way UE4 textures look, reflections, glass, chrome, blurry reflections, shadows are not up to speed with other programs and to me that makes the whole thing look less than what I would want. To each is own! 
Koola and others have done great things with the software but I still see these things.
. I think what you see is the clarity of the image in UE4, it comes out very crisp like high rez video, where in other render engines you have to address that in post. I think that is what drew me to learn UE4 to begin with then the limitations became apparent.