A little related to the crossbow subject. I never liked the combat in Assassin Creed, it was very blunt, picking weapons was annoying some times and enemies fight more like trying to survive than trying to kill you. Also because I don't like how some weapons are used.
But, the game is about assassins, not warriors or knights, so I think it was something to expect.
I hated that the asscreed games had sword fights and stuff. What should have been a fail condition always ended up being more fun than sneaking around at some points.