I haven't had any problems with getting plants to stay in my EC. I think it's pretty dense all things considered. A bag of EC seems to be about the same size as a bag of Flourite, but weighs 4.5 lbs more. Plus EC has a lot of very small particles in it. Now I don't have anything like hairgrass or glosso either. Don't know if that makes a difference.
Much agreed on the color. I love it, makes everything else stand out.