I will say I do have one MAJOR concern with Unchained:
Most of the animatronic figures in the ride are doing highly articulated, fast and intense movement on loop for 12+ hours every day. I'm worried about the longevity of that. In less than a year we've already seen most of the Tiana animatronics almost never work, so I really hope Universal has a plan for these monsters.
Also, really hope they keep the first preshow ending with the lights going out as you enter Victoria's lab, much more effective in keeping that genuine tension and nerves, and just scarier! In a video from yesterday the lights stayed on, hopefully it was just a 1-day thing?