Beautiful tank, are you going to let the Rotala in the back grow higher, or are you limiting its height? I think it will loko great when it gets taller. I really like the use of Callitriche stagnalis. It is a refreshing change from glosso and HC foregrounds. It seems darker greent to me than HC, but has a smaller leaf than glosso.
This exactly I am using rotalas in this height and trimming. The use of the stagnalis is different therefore is always seeing aquariums with hc or glossos and the leves you made right.