I like it with bigger leaves and not too compact growth too. The texture will look better and made them more like a bed of plants than a bed of.. I dunno something not plants?haha
Maybe reducing your light intensity would help. This is what I noticed to my HC after I changed the lighting from 27W+20W to 27W+13W. Or maybe just because my picture was zoomed more than yours and made mine looks bigger.
But still, being able to grow healthy HC is really a significant success for most people in this hobby