Alright, that's a wrap. My Odyssey lasted for 96 hours, Kassandra reached lvl 60, and I finished all the three major paths of the game, did a bit more, too, and got the platinum trophy. This was a good game. And an even excellent AC game, I'd say. The massive size of the world was pretty much the only thing that felt unnecessary every now and then, but then again the biggest plus signs were Kassandra herself and the rpg elements that the series had took along for this journey. Really liked those decisions, big and small, you got to make and Kassandra's delivery on them.
Tough call to think about if this or Origins is better. I liked Egypt better as the milieu, but what does one appreciate more in a game depends on many things. More time is needed now to let Odyssey sink in better.
Oh and I really liked the Cultist system, that whole hierarchy tree. Such a big number of them around the world, but still not too massive amount. Really appreciated how some of them turned up from both story missions and some from side quests. And some were just living their lives in the Greek world, waiting for the ticket to Hades I'd deliver.