Well Torghast was awesome, and is still awesome and I'm really stoked to get into it for real next week. Best thing they've added since the Mage Tower and more than enough reason to do the xpac. The new dungeons are great too, and the classes (at least all of my mains - shadow, frost dk, marksman) are actually fun to play again, unlike the entirety of this piece of shit xpac we're about to leave. There is a ton of cause for concern with covenants/conduits and balancing, still, but this is a good expansion and I've really enjoyed what little time I've had in beta. The zones are also, as usual, awesome and some of the story beats are actually cool. I love leveling up the first few weeks of a new xpac and enjoyed it even in BFA - this is significantly better than that experience so I'm excited to do it "for real" Monday night. My newborn baby and toddler notwithstanding......
The Maw seems like a complete waste of time and thrown together at the zero hour - even after their "fixes" it still isn't fun or engaging. Think this is something they have plans to update but not sure what they'll do here. Not even sure that they COULD do with the zone really as the design itself seems fundamentally flawed.
TLDR: Leveling, the zones, the classes and story are all great imo. Torghast isn't just great, it's excellent and I'm extremely stoked to dive back in even after playing it a ton in Beta. Conduits/Covenant choices, The Maw, balancing could eventually derail the really great initial feelings of the Xpac, but I don't really give a fuck. I usually flame out a month or so after launch anyways due to the time/commitment involved in raiding, but the initial rush/experience is going to be quite good.
Will easily last me until Cyberpunk finally drops (whenever that is) and that's all WOW is to me anymore. A fun diversion/distraction, between "real" game launches. It's a theme park to visit every now and then, not something anyone should want to live in long term.