I will add to what Bigshow is saying....
Good example, I got a blue matrix and a strawberry shortcake from BS. I had no worries about the matrix, but I looked at that SS and thought "it's not going to be happy at all about this change". Just my experience with certan acros, and where I wanted to put that one. As expected, the matrix lightened a little bit, but more or less started putting out growth tips, so it will likely be just fine. The SS, as I expected, went pale beige. HOWEVER, it has good polyp extension, so I know it's healthy. What I have noticed with my setup is that I either have to put new sps near the bottom (and deal with brown underside if it takes off), or just stick it where I know it will get light and let it go. What I highly suspect will happen will be the original husk of the frag will sit and encrust, and all new growth will be totally a different colour (most likely near fluorescent), but it will very likely be spectacular. Like that red convexa I got from Darryl. It looked like crap for almost a year, didn't do anything at all, I mean nothing, but it was alive, so I left it. Now it's green, yellow, red and a bit of purple. It just had to get its shit together.
Not everyone is willing to wait a YEAR for a coral to get its shit together. For me, I really like the results (my limeade nasuta has finally put out new growth, and the polyps are ice blue....totally unreal), so it's worth the wait.
Just my .02¢