Simple enough, yes or no? It's not likely to happen during BfA, but would you want to see the return of tier sets (and class-specific sets) with 9.0? Feel free to specify why/why not as well, the more constructive, the better.
I would like to see them return because they were a better system than Azerite armor. In my opinion. I also believe that new classes such as Demon Hunters and any added in the future deserve to get class-specific sets to their name. Raid environment themed sets sound good on paper but haven't, in my opinion, been realized to the level they could have been. They could've added 2 sets for each raid and armor type, for example.
Edit: The result became even more clear cut than I had thought. Gonna be linking this thread whenever giving feedback about this topic, others could also do it if they so please!
Here's hoping, another worst case scenario would be that they'd double down and keep iterating on the system rather than realizing that they had a good thing going with tier sets + the Artifact system of Legion for max level gearing progression.