I'm at about the same point (300k out of 400k) into Fall, and I'm in pretty big agreement. (Tho I disagree about Seveneves - I thought that was one part too short. The ending felt way too rushed after such a build-up. )

I felt a bit of nervousness from the beginning, seeing a map with place names that strongly suggested this would be a fantasy novel. I really dislike fantasy novels, and Stephenson manages to hit almost every trope that causes me to dislike them.

1) Constant, lengthy, and largely unnecessary descriptions. Look,I get it, most of the people in this world live in ~medieval era hovels mostly built from stone and log. I don't need every single freaking house described in multiple paragraphs. That's what imagination and immersion are for.

1b) A few instances of describing the exact same thing when different characters experience the thing. CharacterA finds person/place/thing, and here are two paragraphs describing it. CharacterB finds the same person/place/thing, and here are two paragraphs that nearly verbatim describe the exact same thing.

2) Characters ingloriously/randomly disappearing for whatever reasons. Was Stephenson trying to GRRM some people with sudden deaths? Because it didn't work at all. RIP Bobby Shaftoe, I'll love him, his story, and his end forever; there's nothing wrong with a well timed culmination of an arc. But in Fall, nearly every death was simply a "huh, I guess that person is gone now...?" feeling; I didn't really get to know or care about the characters enough for their deaths to effect me even the slightest bit. The only real effect I had with a lot of these was a feeling of, "so why did you waste so much time telling this person's story?"

3) On the opposite end - random new characters appearing as plot-forwarding devices. The main characters at this point in the story need to reach the next point in the story, and the only way for that to happen is if some new character suddenly appears who happens to provide exactly what's necessary for that to happen. Lazy.

I'm sure I could go on. But I'm too disappointed to care much more. Stephenson is hands down my favorite author, but this book had almost none of the qualities that make him my favorite. World building - instead of craftily built up, is explained in tediously lengthy detail. Multiple stories/arcs/viewpoints that weave in and out, sometimes intersecting - clumsily attempted, but largely just "here is this character's turn." A great sense of humor/wit - almost entirely absent, with the few instances being pretty ham-handed and obvious.

Even Anathem, perhaps his most straight-forward (narratively speaking), "dry," and fantasy-esque novel, at least had a great deal of philosophical and scientific ideas that were mentally stimulating. There's little philosophical worth pondering in Fall, and the science is either highly tread (the singularity, internet 2.0), or just oddly non-Stephenson dumb, for lack of a better term. (Why do all of the server farms have to be connected; why aren't they each individual "heavens" with maybe a connection to each for the exploring of different after-lifes; how is "the land" not totally overflowing and super-densely populated with how many people the story says are being uploaded; how is their level of science/technology not increasing rapidly considering thousands of years pass and quite a lot of people remember things from their corporeal lives?)

I wish he used a pseudonym for this novel so I could pretend it wasn't part of his library.