Belltrain, your bamboo shrimp looks great! He must be loving that fast current, since he can just sit there in the middle of the buffet, lol.
I really like the sparse aquascape, but have a couple of recommendations, if you don't mind. First, I'd replace the black rocks on the right with some that are brown, etc. to work better with the pebbles. And I'd replace the rough gray rock on the right with two or three large, smooth stones, also closer in color to the gravel. (I think rocks of mixed but similar colors tend to look more natural together.) Letting the driftwood be the only sharpish thing in the river would make sense: River rocks are always so smooth from eons of wear, but the tree could have died only a few months ago, you know.

The placement of the wood is great, btw, as it looks like pieces have just been worn/torn away by the current. Very nice effect.
If you do decide to add more plants, maybe something long and grassy that will stream around the wood and rocks.