Sorry, BRAH. But i dont believe you could be more off the mark.
For starters, morrowind "rapped" your face. (and yes, i spelled it the way it was intended to sound.) I have friends who claim its better than Oblivion
Secondly, the story isnt unoriginal. You cant knock it down to just those three things. So much happens in between, and so much goes on outside of the main story, it is foolish to say its unoriginal.
Graphics rock. They eat babies, they're so rockin.
To be honest Oblivion is one of my favorite games.
But to be on the fair side, i will give you this. Aside from Patrick Stewart, and Shawn Bean, The voice acting was atrocious. Well, not that the voices done were bad, but like the voice "team" was literally like three people, and voices would change from topic to topic.
It had its problems, but as a gamer, it satisfied me like Ron Jeremy might for a nun. You know... Deep and against God.