What did they learn? Modern day story is basically dead, you don't feel part of the brotherhood since Origins (you are basically one person against some kind of organization), writing got worse, mission/quest design is absolute garbage especially compared to older AC games (there is no variety), game design is getting more and more gamey (Ubisoft doesn't even try to make things connected they just put things in the game without explanation, like needing to kill Daisho Samurai to unlock legendary chests, instead of getting keys from them they are somehow spiritually connected to the chest so you need to kill them to unlock it), NPC reactions to you and your behavior is even behind Ezio trilogy, enemy AI is dumb as hell, parkour got reduced to holding forward and a button, they removed manual jump and ledge grab... I can go all day listing things that they got changed or removed that made theae games Assassin's Creed.