Still, too symmetrical in my opinion. Your two outer rocks, they're like this: / /. In order fix the front left, I'd take the far left rock and replace it with the one on the far right, and then take the one from the left and turn it inward, like this: / \. I'd slope the substrate some too. I think all of this would look more natural.
Can't wait to see how this turns out.
"Simplicity is the ultimate sophistication." -- Steve Jobs