Origins and even moreso Odyssey put way too much emphasis on level progression. It's not just that quests are level gated and side quests are necessary, it's that enemies two or three levels above you end up being damage sponges and are a pain in the ass to kill. Not just a challenge, which would be fine, but annoying.
They're so close to being dream games of mine, open world melee action games with Souls-inspired combat, but the emphasis on level absolutely kills it for me. They took inspiration from Souls for combat, but missed the fact that the power curve in Souls is small enough that a skilled player can take on any enemy at level 1. That's *technically* possible in modern Ass Creed too, I think, but the damage number scaling makes it way, way more annoying.
Valhalla is apparently dropping levels and I'm really hoping that evens it out more.
I've been playing Skyrim again recently, and, while the level scaling isn't perfect and is often derided, at least it does it's job and allows the player to choose what they want to do and where they want to go, while also keeping enough low level enemies around that the feeling of power is still there. Souls games, while not quite as open, similarly allow players to go to some near end game areas right from the start. I think Assassins Creed needs to strive for the same kind of goal.
Also, really not a fan of people saying that those who dislike the progression system and level gating in the new Assassins Creed games didn't play it. I've bought Odyssey twice, once on PS4 and once on PC (hoping 60 FPS would make it better for me), and have put some time into both.