Not super experienced, but the branch puts a very noticeable focal point almost dead centre of your tank. It divides it in two. For some reason asymmetry looks best, that branch makes it look symmetrical. You could attempt a different location for the branch, and maybe soften it with some plants growing off of it, java, maybe buces, moss even. I would even try it over you stump, with the larger portion poking up out of the water, and the finer branches pointing down into the substrate like roots. Or maybe shift the branch to the left, keep the orientation, and have some branches poking out behind the java fern. Might want to look up the rule of thirds, maybe read about how to make a photo appealing by moving a focal point. Painters do it, we just don't get paint, we get plants.
Lol please excuse my horrendous photoshop skills (GIMP actually), I tried moving some things around, and adding smaller pieces of wood
I'm just bouncing ideas here. Have a beer, and spend an hour moving it around.