I do like the current Variant dungeons, they're chill to do solo on my own and if I want to figure out all the solutions on my own there is a decent amount of them that aren't that obvious. Now we can argue that we want more solutions, more paths, harder puzzles, easier puzzles and whatnot, and my main gripe with them right now is mostly that they always follow the same formulaic patterns, which is not always something you'd want for all your content imo, especially content like this, and that once you have done all paths, you're essentially done with it, which is a lot of development resource for now much replayability.
However in their current state, Variants are great and provide something chill and unique.
I'd definitely like however to get roulette/daily modes of those where the puzzles are removed, and where you'd get random path each time, which would really alleviate the heavy repetition of roulettes over time, while introducing some chaos and rng to make runs more unique from each other. And if more normal dungeons could also follow that pattern, that'd be dope.
I understand that for a lot of people dungeons are chores that they want to finish as fast as possible, and that's probably a huge failing either on the community itself or the design of the game in general, but I do like dungeons and don't give a crap if the dungeon takes longer, actually if stuff doesn't melt instantly I can actually take advantage of my DPS job that can't always insta burst like tanks and healers. All of this even if today less so due to the abysmally bland battle system we have. I'd love more little random events and alternative paths (attributed at random, else the players would always assign one the meta path and never go for the others), but if I play dungeons and I don't think I'm assuming too much by saying this, a lot of people as well do it for the standard dungeon progress clearing trash and killing bosses.
If I want to find keys, solve puzzles and whatnot, I'll go play V&C instead. Puzzles where the solution is known and fixed are only fun the first couple of times and that's the huge weakness in the replayability of Variants. Puzzles that are randomized on the other hand are closer to deep dungeons than carefully crafted standard dungeons, which still doesn't fit the bill here in this particular case in my opinion.
I also have no idea what Blackrock is, I never played wow and do not intend to.