Ok, so, my main gripes were with the pacing and the handling of the mystery. (spoilers for Severance seasons 1 and 2)
I LOVE that it's a high-concept scifi show, with lots of mysterious bits, lots of references to irl tech companies, interesting details that pertain to bigger theories, ... I'm 100% the audience that stays on reddit after hours to look for clues and try to piece it all together.
However, i very much despise mystery for the sake of mystery, and that's what season 2 has been. I would have liked them to close some of those loops they opened, to give some answers, and they just didn't. Worse, they added MORE mysteries, more threads. So it's very unsatisfying to follow.
It feels like a waste to have such attention to details, and to have writers who are openly proud of it, just to not address them or do anything.
The biggest offender was the watch thing: they told us in interviews to pay attention to the timing, and they gave us close ups of watches and clocks. So i did the math and saw that Mark spent an extra day on the severed floor. The writers added bits of plot around it: Mark is confused about garbage day, Mark doesn't realize the party is tonight, ... And yet, by the end of the season, there is no payoff, no revelation, no nothing!
The second problem is the pacing. I understand why they needed to have Mark reintegrate at the start of the season, so that they could move the plot forward and have the Gemma episode (which was fantastic btw!) but then they had to drag it out and it felt a bit boring.
The Cobel episode was 100% filler, and should have been put in with other stuff in one episode, not have an entire one for itself. Especially right after Gemma's, which was one of the best episodes of the season, and i wanted to go back to saving her right away, not have another background sob story.
And since we're not resolving the mysteries, we can't really move forward either in any of the plot threads, if you see what i mean.
Some characters were also badly handled. Reghabi for one, who is a badly written plot device (as opposed to Gretchen who was great!) and just pops off from nowhere when she's needed. Or Irving, who's story ended how? Wtf was that train thing? Like there was no update into his investigation, no reveal of who he was talking to on the phone, ...
And the final criticism i have, is that the writers have somewhat lost the grounding plot: this was a satire of big companies, and a reflection on work and identity. When you start adding so much "magic", you significantly move away from that.
They had some good moments with the Lumon propaganda thing, or some of Dylan's story, or even Attila and co. But they removed the dynamic of the quatuor at the office, they stopped showing oMark interact with outside people, ... and so they kinda stopped interrogating what it means to work, especially for such a big, sprawling company, with evil goals.
Sorry for the wall of text, and the slightly (slightly?) discontinued train of thoughts, but that's generally my problem with season 2. I will still watch season 3 of course, but i'm much less enthusiastic about it than i was after season 1.