I've been thinking about adding more rock actually! Maybe my reason(being aesthetic) is not the most important one but I guess if would also help I'll get more, thank you for your input!The big 3 rules are:
1) go slow
2) slower
3) slow down!
But I think you get that. The only other things I'd add are to have a reason for everything you do. For example, I've seen people add a GFO reactor just because everybody else has one and it gets talked about a lot. But unless you have high phosphates it's not necessary and can even be detrimental. Corals don't like zero PO4/NO3. They need nutrients.
Research everything before you buy -- absolutely no impulse buys on livestock.
As for your tank, I like the look but I'd be a little concerned that you don't have quite enough rock in it. Rock is the home for your nitrifying bacteria, and as you add more bioload you may find that your bacteria is unable to keep up. Keep a close eye on ammonia as you add livestock. My rule of thumb is 1 lb rock for every gallon of water.