They are beautiful, intriguing animals, but doubt if their condition has anything to do with zoas and spacing doesn't seem to be the issue. A quick review of hobbyists' and retailers' sites leads me to conclude that many hobbyists have significant difficulty keeping elegance alive for long periods of time, while suppliers suggest they need only "moderate" care in terms of flow, light, etc. Maybe this difference is explained in part by collection methods - stressed animals thrown into a bucket and then flown many miles will soon/eventually weaken. Like BoomCorals wrote, if they have been fully acclimated to reef tank conditions, have all the signs of healthy animals, etc. your chances of successfully keeping them are much better.
Someone recently wrote on this blog that "elegance belong in the ocean." I think they got a lot of likes!