I am not here to rave about how unrealistic or boring or whatever AC is. I just want to suggest little things that would make the experience deeper that the developers could add in AC3 or as an update for ACB. By all means reply with your own suggestions.
This is across all AC games:
When Altair or Ezio are sitting on a perch at the top of a viewpoint their robes fall through the wood.
Just in ACB:
When Desmond gets into the Animus he still has his backpack/ rucksack/ satchel on and it would probably be really uncomfortable.