Xd is an amazing designing tool. In some scenarios due to contrasting colour in the background design it is very difficult to notice the Pixel distance(number & Guideline) Pink colour even at maximum of 6400%. I hope this would be rectified which help.
This would help us increase the productivity rather reducing opacity of Background colour to re-check the pixel distance every time.
Since it is already an Auto-Suggest it could suggest better by knowing the back ground colour or Designer could change the Background according to the colour variance.