That's beautiful. I love the wood and the plant on the one side and the uneveness works.
I'd add a medium rock to the far right. Maybe a big gunk of Jasper? and I'd get a bubblewall the runs the length of the tank. Bigals online sells black ones @ that have inputs on both sides.
and Chico, I mixed in one 5 lb bag of mixed stone in with 10 - 3 lb bags of Walnut and I'm still picking out the white stones.