The tiger lotus looks really good. I just pulled two of them and the root structures were huge-just after 3 months from planting from a bulb. Real fat and spongy roots too. Mine kept forming pads of the surface, even after trimming to keep it short. Looks really nice though, your glosso looks good.
I will move the driftwood closer to the center but not on the center! So more plants can be added to the left side. Then you will have more space to have a nice triangular design try to keep the shape and color of you plants in good order this will help you more than what you think.