Kudos to you for managing to plant all those plants with the Fluval Stratum. I nearly pulled all my hair out trying to do the same with my HC carpet (link to journal in signature). It was so light that nothing would stay planted. I went from Aquasoil which was very dense and a breeze to plant in (especially the powder type).
You should add more rocks to the left side. It looks a little sparce right now.