I am not a huge fan of the AC franchise, but I love history and mainly played through most of the installments only due to it's historical setting.
AC Odyssey is a good game, with fairly easy and arcade-ish gameplay, a soft, forgettable storyline and a rather shallow depiction of historical characters.
As most of the AC games, the main story does the bare minimum to keep the player interested and has very repetitive side activities/quests.
Graphics: 9 Beautiful graphics
Sound: 7 nothing memorable in particular
Atmosphere: 7 did not particularly good to give me an authentic feeling of being a part of the ancient world (we include here sound, story, character, dialogue, etc.)
Story: 7 - Average, forgettable
Setting: 8 Good details on building, good textures, good looks overall
Gameplay: 7 good gameplay, though repetitive (everything, including the game mechanics)