prop spam

When playtesting one of my maps (headquarters, to be precise), I noticed a recurring piece of feedback of people saying that the map has prop spam. Isn't the whole artpassing thing to cover the map with a bunch of props? Or am I doing it in a way that doesn't look coherent? What are the ways to...

My entry for micro contest 22 Within the first 2 hours i gave entirely on trying to make something that played well enjoy >:3c