The principles of running QT, and the ultimate goal of it, is to alleviate stress on the fish while it acclimates to captive life in a new environment. A QT also allows the fish to be observed closely, in a smaller environment, for further stress or disease; and allows you to treat as need be. In addition, the new fish doesn't have to compete with tankmates for food. With that being said, everything that I have read within the past several posts is completely contradictory to the goal of getting this delicate 1.5" angel to safely acclimate and ultimately thrive once introduced to the main display.
By adding the fish directly to a main display, or even to the refuge, because you deemed that it was too delicate or small for QT, or it appeared to be healthy, may or may not have directly lead to it perishing. You mention it was added to your refuge, but that is still a stressful new environment for that fish. Even if a fish appears to not be harrassed, or it doesn't looked stressed when added to the display/refuge, you can not guarantee that the fish is not still experiencing some level of stress that may have caused it not to eat, or to have lowered its immunity, making it succeptable to disease.
Wayne- Your logic of "I figure if they die in that kind of environment, they'd most likely die in a qt'd medicated tank too" is a faulty one. Bottom line is if you have previously lost fish in a QT, and this is why you have opted to forgo it now on a $$$ high end fish , you may need to re-evaluate why QT has not worked for you. Was the QT not mature enough, was the fish not healthy upon initially receiving it, did you medicate it too quickly or before it had enough time to settle in the QT, did you keep up with water parameters, etc. You obviously have the means to have a pretty serious QT if you wanted. A Conspic that size doesn't come around that often, it is a shame to have lost it when it could have possibly been avoided by properly QT'ing.
I apologize for being preachy. I have learned the hard way over the last 12 years in this hobby that QT is very important for the long term health of your tank. I opted to not QT a delicate Regal Angel back in 2006. It had velvet and wiped out almost my entire tank. I have been running the same QT set up since and the only fish I have lost recently were ones that came in and were visibly sick, malnourished, or infested with parasites and had no chance of survival anyway.