I really like the look with the live rock over just pvc pipes or other more sterile media. I sort of consider it another display tank. I like to sit close to my tanks and look for hitch hikers or pests so I want something more pleasing to look at so that task is more enjoyable and feels less like a task. I can stare at a reef tank and become mesmerized for an hour or more. My wife thinks I'm nuts and I probably am.
My DT was aquascaped using homemade aragrocrete and dry rock. I seeded it for bacteria, coraline algae, and "good" hitch hikers (hopefully) using the live rock in the QT and then returned it back. Of course like most of my fellow reefers I want to get another tank in the future and will be able to seed it with the same live rock. I haven't added any fish yet to the DT, but when I do I will use the QT. if I detect any disease or infection I will move the fish to a hospital tank and medicate there.
Sorry for the long answer. Lol