So... that ending... (megaspoilers obviously)
Well... Huh. That was... something? Just some thoughts;
1. Why the F was this even Bayek's game? Don't get me wrong, I liked him, but after killing Flavius (a villain even blander and less developed than Germain, if that's possible) Aya just completely takes over and steals the ending. I can't be the only one disappointed by the fact that the character we spent 40+ hours with just kind of disappears in the end, and his wife (who at that point was way weaker than my Bayek, and far less likable to boot) does all of the cool stuff. Bayek doesn't even get to be one of the dudes stabbing Caesar? C'mon. Why is he considered the founder of the Brotherhood then? And speaking of which...
2. Bayek (and his random cronies from the sidequests who are supposed to be the OG Assassins) keeps talking about "our new Creed." Which is... what, exactly? They literally never spell it out, in what is supposed to be the origin story of the Creed. Sure, it's paraphrased in one of the First Civ tombs (which Bayek weirdly doesn't comment on at all when he finds them) but they explicitly say he can't understand the words of the recordings. So... what's the Creed, exactly?
3. That breakup came out of freaking nowhere. And they both acted like it was an inevitable conclusion. WTF?
4. Modern Day is dead. Period. Even with a playable character and a William Miles cameo, none of the mystique from the Desmond era has returned. I think it's officially time we bid farewell to the Animus, or else finally go through with a hard reboot. There's just way too much baggage at this point.
5. The Amunet reveal totally doesn't work unless you're a pretty die-hard fan who remembered the name of an obscure Assassin statue in Ezio's basement. And if you're that much of a die-hard fan, you probably saw it coming a mile away (personally, I called it the same day Aya was first revealed, and I'm not above digging through my old posts to prove it if one of you want to call me on it :p
6. While Khemu's memory was kept somewhat fresh by the stone circles and Duat sequences, a revenge plot just can't sustain a 50-hour game. By the time Bayek started beating up Septimius screaming "you killed my son!", I really wasn't feeling the sting anymore.
Overall, I'm quite disappointed with the story. Despite some standout moments, the game just can't hold a coherent plot together. The game was a lot of fun and the world design was amazing, but this was the first time I've finished an AC game and not wanted to play it again.