I finally got around to unlocking the Nightborne recently after the long trek through the Suramar questing. The experience in Suramar was great and yet at the same time, it really seemed to drag on too long. I enjoyed that it had a cohesive story and that the zone changed with the progress, but I think it would have been better if it was shorter.
As for the unlock scenario, I really enjoyed seeing more story surrounding the blood elves. I realize the scenario was arguably about the Nightborne, but I was too distracted by the Sunwell, Lor’themar, and Lady Liadrin. And Alleria. Come to think of it, was this scenario even about the Nightborne?