I've loved it so far! The storyline has been cool, I loved Revendreth and Castle Nathria, Bolvar is a great protagonist and Sire Denathrius is a great villain, the cinematics with Sylvanas are great, and I can't wait to see how the Anduin / Sylvanas arc ends.
Going in to more detail I think Sire Denathrius is actually my favorite part of this patch. He is such a royal pretentious d---. His voice acting and dialogue are perfect for someone that's been the king of Revendreth for time immemorial. Even better when you get in to phase 3 of his encounter in Castle Nathria he gets pissed and as he starts to realize he's losing he screams at the raid like the entitled overconfident p---- that he is.
Mechanically I hated that fight in the beginning but slowly learned to love it. Every week I learned something new. I reviewed so much video and I kept finding new details that made the fight easier. I almost exclusively pug and I always find it amusing when someone without AotC whispers me that "they know the fight." I wish I had the time to explain that if I've spent 20-40 hours doing 150 pulls plus all the hours reviewing those pulls and their parses, then someone that hasn't ever even finished the fight doesn't know the fight in nearly the level of detail I want. In my opinion that is one of the hardest heroic fights ever, with tons of one-shot mechanics, narrow windows to phase transition, and a knockback or pull-in going off every 15 seconds during phase 3. (I didn't raid BfA or Mists much but the only encounters that I feel are in the same tier of difficulty are Heroic Kil'Jaeden and maybe Heroic Archimonde.)
Switching to the covenant system, I think that was a neat idea and I'm glad they tried it. We all knew that there'd be a few OP covenants and that everyone would pick, but I think the four different flavors add a little variety to the game. In some ways it's more fun to be one of the classes that doesn't have an OP covenant, in which case your choice actually matters.
Moving to Torghast...Torghast is a bit more of a mixed bag. I really struggled with it on my priest, they've received a few better powers but in the beginning I felt like I had to cast Mind Control on every d--- mob and it just took forever and was clunky and not that much fun.
After doing it for weeks on my priest, I went in there on my death knight. My first anima power increased my damage, and I was thinking...wish my priest had some of these!!! The death knight powers are a lot of fun so I enjoyed it quite a bit more and it went by MUCH faster. So I think Torghast I'd like to see a little more balance. I am optimistic that 9.1 will bring some fun stuff like the ratings, new layers, and permanent upgrades, so I'm excited for that. The one thing that I think is genuinely bad about Torghast is how punishing it is for alts. To play an alt I NEED that soul ash and having to do Torghast 4 times, 6 times, etc. really turns the place in to Boreghast.
So I'm giving Torghast a "B", but I do think that an opportunity was missed to do something more like the Mage Tower from Legion. The mage tower was really interesting and even though I was a mythic raider at the time, I struggled quite a bit learning how to do that and it definitely made me a better player. There were some ways that my spells interacted (I was a resto druid at the time) that I literally didn't even know from two tiers of mythic raiding.
There's a place in the game for very challenging solo content that isn't timed. I definitely prefer the difficulty being in finishing the fight at all as opposed to the mythic+ timer. Although part of the price we pay for having twelve different classes with three specs is that it takes way too many developer resources to create, test, and balance thirty-six different dungeons.
Next subject: The Maw. It has great theming. It is Hell. It plays like Hell. It's supposed to. That doesn't mean I like it.
(Getting the mount helped a lot, although I was already exalted by the time I got it.)
Balance: Raid balancing isn't too bad at least in my experience pugging at the heroic level. Raid healing, raid DPS, and raid tanking are in a pretty good place. And WCL stats show all the healers being pretty dang close to even. There's definitely some over and under-achieving specs but you generally don't see heroic sire pugs asking for specific tank specs or specific healers.
Mythic+ is a little less balanced, with DHs and holy pallies obviously being over-represented in high keys and OP in lower keys. That's unavoidable though, if classes have unique abilities then some compositions will be better than others when in small groups.
One thing that could be re-balanced however is the importance of covenant dungeon bonuses. I feel my necrolords bonuses are kind of underwhelming in Theater and Plaguefall, and in several weeks of grinding out KSM I never once saw an ad that said "Must be Necrolord". As opposed to Halls of Atonement, where I wouldn't even join a group that didn't have a venthyr, the way the gargoyles are placed makes them quite difficult to skip. And doing De Other Side without a night fae on fortified week is GG on the berserker trolls.
There's also a bit of a gap between dungeons. If I could do anything I wanted to the game the first thing I would do is take a minute off the Spires of Ascension timer and add it to De Other Side. The bosses in Sanguine Depths are quite difficult and the bosses in Halls of Atonement are quite easy. (Echelon is balanced appropriately though.)
Gearing:
This is probably the weakest aspect of this patch. The Great Vault overpowers all other loot and it just makes it difficult to gear quickly. +14s giving higher ilvl gear than heroic Sire Denathrius has also steered a lot of people away from doing him which is a bit of a problem for a guy like me that runs a pug most weeks. I didn't play many dungeons without the valor system, but I can't imagine running all these dungeons and not getting gear of an appropriate ilvl from the end chest. 14s and 15s do not reward gear appropriate for their difficulty from the end chest at all.
Random tidbit:
I love the new animations for paladins...I used to summon the light with a "whoosh" but now it's a "POW!!!!"
Last subject of lore. It was super cool to bring back Alexandros, Draka, Ysera, and I really liked those stories. But I am so tired of Kael'Thas and Kel'Thuzad, OMG. Although I do like the stories in this game ever since Nefarian and Onyxia came back in Cataclysm I just roll my eyes at how these major villains keep coming back. We literally cut off Nefarian and Onyxia's heads, strung them from the rafters of Stormwind / put them on a pike in Orgrimmar, and then presto change-o they're back. BS.
Overall I'm giving Shadowlands an "A-". I've really enjoyed it, but gearing is the one thing knocking it down a grade. There's a couple missed opportunities in Torghast and an eighty-sixth re-hashing of some villains, and a few minor balancing issues that would've been needed for an A+.
P.S. My absolute favorite moment in so far was my first Council of Blood pull. I cracked up watching the raid suddenly split up and start dancing with a bunch of dredgers!