My problem with the Archives
I don't like the Archivist (or Overseer, or Prisoner, or whatever they'll end up being called). The idea of an independent NPC who exists in the Fog but apparently has a doctor's note excusing them from the trials or whatever doesn't sit right with me. To a lesser extent, I don't like the Archives as they were presented during the anniversary stream - as an impressive-looking library, both grandiose and welcoming.
To me, both of these are antithetical to Dead by Daylight's tone. No one should have a good idea of how the Entity works - they can certainly guess and even be right sometimes, but no one should know enough to be called the Archivist. Furthermore, no one should have an impressive location that is truly their own. The Archive as we've seen it looks too secure.
That said, I do like the core concept of the Archives. I also like the idea behind collecting these bits of lore - snatching scraps of memory from the Fog and hoarding them. It should just feel more desperate and unsure.
Personally, I'd remove the Archivist. It seems like their only purpose is to give the characters sidequests, but these sidequests look similar in spirit to daily rituals, and we don't have a discrete NPC giving us those - so I say just abstract it in the same way. "Going out of your way to do specific things during a trial" = "The character trying different things in an attempt to figure out how the Entity's domain works". Furthermore, if the Archive must be a physical place, make it look more like a magpie's hoard of disparate miscellany, jumbled together under a log or something in a pitiful attempt to safekeep them. Maybe even sell the "locations are made of memories" thing by making the Archive a location crammed with assets that don't belong on the same map. You could even give each character their own individual archive to imply they're each collecting memories independently, and make them visually distinct - like Claudette's would be a mix of the university she was studying at and forests or gardens where she first got interested in botany, or Kate's would be a jumble of smoky bars, country fairs, and open road. That kind of thing.
The point is, I don't like the idea of anyone getting a foothold against the Entity - anyone that still exists and is sympathetic to the current playable characters, anyway. Vigo carrying out bizarre experiments that ultimately put the other characters at risk is fine, but a friendly librarian who helps out the characters and lets them crash in their cozy library is not.