Crop overlays are too difficult to see. The lines are way too thin and very light Why not at least provide options to make the crop overlay lines bolder/wider and possibly different colors, as light gray does not always work.
I'm referring to Lightroom 5.7. I also use PSE 13, and have no problem at all seeing the crop overlays there.
 The outside border of the crop rectangle is easy to see. The part that is difficult to see is the inside lines, e.g. the thirds lines in the rule of thirds, or the spiral in the golden ratio crop.