Very recently Bali aquaculture has been putting out beautful stuff! IMO you have nothing to worry about with the way the pieces are mounted. Kistheeze brings up a good point regarding the sun, and that is one of the advantages of light movers and multiple halides. However, while tank grown specimens will alter their growth form according to your lights (and other factors), no matter how they grow there will always be parts that are shaded. These polyps will not hold nearly as many of the beautifully colored pigments that are brought on as a sunscreen (the reason top shots of sps tanks are always the best), but unless severely shaded they will not die. I have many colonies that have shown this. I do prefer tank grown for other reasons... mainly that the coral has been shown it could thrive in captivity as there are many wild species that have a rough record in captivity (like many of the table species, including A. clathrata).
My two cents...
Johnny