Looks pretty good. If you want to try something move the last left rock to on top of the right most rock. It would jsut breakup the straight line on the slope. Might work might not. As it is i like it.
Hopfully you want honest answers because I'm going to be honest. I don't like it. It's boring. Your fish need places to hide there aren't places for them to hide at night or run from aggressive fish. The slope is featureless.
What are your plans for the tank? What type of coral? Fish? As it sits, once you cover it with coral, it isn't going to look like much (the rock, although it does look good, will completely disappear). Doesn't offer a whole lot of hiding areas for potential fish.
Its too central, its just a slope. You need holes and caves for the fish to feel secure and a place to hide and flee, do some experimenting with different placements and shapes, I really enjoyed scaping my tank, you will know when you really like it and its what you want.
Its your tank and its you that has to stare at it every day so if you like it then its good, these are just opinions.
Have fun
I like it because it gives a good base with a lot of room for growth.
What kind of corals are you planning? I think smaller things leading up to a stag horn on top would look pretty awesome.
I'm a fan of some tunnels and caves, especially if you will have some fish! I think its is a great start and love the slope! Looks like you have a lot of room, maybe add a few more rocks to create some hiding places and swim through spots? I'll subscribe and see what you decide...
Also - you are the one that has to stare at it, so whatever makes YOU happy!