Bro, I used to have a similar scape that you have right now. You can refer to the first page of my office nano 3 tank thread. IMO, I find it hard to place corals, and there were too many shadows and too little open space for fishes to swim around. Perhaps you can try to visualize your scape with corals on it? Haha... I know its kinda hard, I struggle with this myself (not very artistically inclined), but it helps to calibrate our thoughts that this is not the final outcome of the scape.