I'm sure that everyone has different aquascaping ideas, but I'll give it a shot...
If it was me, I would move the middle xenia up, on the higher side of the white rock. (So you would then have one on each side of that rock).
I would then move the mushroom rock down where that middle xenia was. Would move the smaller zoos over toward the xenia/shrooms
I'm not sure how big your rocks are, but if possible I would move the rock below your green star polyp to create more of a cave there, putting that rock or another rock higher in that section. Would swap positions with the green star and the larger of your zoos. Last, I would take the small one that is circled red (the one on the sand next to the orangy mushroom) and move it near the new cave created on the opposite side.
Hope all this makes sense.
Just my opinion, artistically speaking.