Not found any of those either (other than the missing pages part outside of the animus). Instead it has the ? things spread around that the Witcher 3 had, with small objectives at every location (mostly find the loot or kill X enemy). Far better than collectibles.
About 7 hours in, just got to Alexandria (third area you get to). Looks great and runs very well, but fairly easy so far. Playing on hard, but I have done all ? and for the most part been constantly 2-3 levels above enemies for quests. Anything equal level or 1-2 higher you need to dodge and be active, but for lower you can just spam heavy attack. The first named I was supposed to kill I ended up killing in a massive spree with 5 other guards doing another quest. Didn't realize I had killed the named. We all ended up in a tent and I just spammed heavy attack and killed everything.
Enemies 3+ levels above you will close to oneshot you while you do very little damage. 5+ just gibs you if they hit. Ran into a hippo 8 levels above me and there wasn't even really any blocking animation or anything. It just rushed me, moved its head and I fell over desynched from full health.
I do wonder if you won't max out your level far before you are done. Quite a lot of zones in the 30-40 range, which seem to be large on the map. I've only done a few quests in Alexandria and I am level 15 already, a zone that is marked as recommended for level 9-11 (there are a few level 20 quest there too). Being level 15 after having explored 2.5 zones out of 20+ makes me wonder how much character progression there is in the end, or if you will get to 40 close to half way.
Ranged is very good in this game. Lots of the quests that involve things like "kill 1 captain" can be done by using bird, target, find high ground, predator bow to head.
Fun, but the ? gets repetitive fast. Out of the 20 or so I've done, I think there are only three variations. "Find X number of loot", "Kill person with golden tag", "Find X number of loot + Kill person with golden tag".