Bumping this. I'm about 60 hours in on Xbox One X.
So far....I'm underwelmed. It's not a bad game, but so far my experience has been EXTREMELY buggy. Like almost AC Unity and AC3 level buggy. I've experienced 6 game crashes so far, and I don't think I experienced 6 total with either Origins or Odyssey. Main quests haven't been bad but I've experienced a ton of bugs with side quests. At least 15 already, and most made the quest not able to be finished. For instance one with a boar that would find you treasure, the last treasure he would either stand over the spot you needed to check to to finish the quest, or he wouldn't go to it. I've seen way more graphical glitches than with Odyssey at this point, from floating enemies to arrows that stay stuck in the air. For them to take off a year to dedicate to this game and it be this unpolished is pretty bad. To make matters worse, they just released a patch and it actually made my experience worse. The framerate dropped and I'm experiencing way more screen-tearing.
Also, it's a Viking theme but honestly it's pretty much the exact same game as Odyssey, just a different era. Same mission structure, same side quest structure, and a gigantic map which sounds cool but after a while it feels like mindless busywork quests. They need to go back to the drawing board for the next game and actually scale it back.