If anything, graphics comes after those. People may say "Graphics make the game", they sure as hell don't. Also it's good to check other game engines, Cry engine might be something you look for in the future.
Graphics =/= Aesthetics. The correct word in this context is Aesthetics.No but aesthetics DO enhance the experience to the player. If you were playing a more story driven game, being able to read body language and emotions would be a bonus to the feel of the game, a game should reach out to the player as much as possible and a great aesthetic helps extend the reach.