I just always like a way to do something fun with the Doomed Timeline type concept

Would we get some hints of this throughout the story? Like, they get way drunker than anticipated because their drunk brain couldn’t send back accurate information about the strength of a drink?

That would be fun
Hm
This isn't necessarily ordained only by ideas so far, but it feels like you could do something interesting with hallucinogenic poisons
If their future seeing is limited by their own observations
"If we go to the Castle, all I see is darkness. Probably a bad sign"
(they got thrown in a barrel)
bracing to get poisoned
really does meet god
Huh

You’d almost have to explain it upfront with a lecture in psyker school about all the diviners who failed to see their own deaths or were misled by other weird flukes of perception and time
Otherwise the reader would feel just as blindsided as the precog
(c)