I always thought Kara should have an "adventure mode" of some sort where you would dress up as a servant and run around doing quests for people inside there say, so I'm really happy to see it come back as a unique 5-player experience.
Most raids are so intense/stressful that people tunnel-vision on mechanics and never actually have time to stop and admire the scenery. I think all raids should start with some sort of introductory tour that lets you explore them so that you appreciate it more when you're fighting bosses there.