i think the red plant on the left side of your tank is too eye catching, i'd suggest you to either take it out or place it somewhere else. i love the sand as the foreground. i would just rearrange the stem plants if i were you.
Here is an update of my scape. A lot change since and it is winter here Quebec so that why the tree has no more leaves. The real reason why is that i order Vesicularia ferriei (Weeping Moss) which is going to replace the java moss that was on the tree. Please let me know what you guys do to make that moss thrive i want a make sure its going to work.
I change the background too made a big difference. I have some more extra plant coming to finish filling out so i will update soon with the new stuff.
I put glosso instead of hc because the hc was to slow growing for my taste and i like the bigger leaves of glosso.I prefer it to hairgrass a lot because the fish crap doesn't stick to it like hairgrass so the tank look better that way.