I think it looks nice. Two suggestions - I would recommend moving the front stone on the right so that it leans more toward the biggest stone. Also, if you want to grow the HC and hairgrass fast with no algae you could drain siphon up most of the water leaving enough to cover the gravel but not the plants. Then cover the top of the tank with plastic wrap. The plants will grow faster emmersed because they'll have a lot more CO2. Once the roots get established and you have a nice HC carpet put the water back.