Rolep-playing my ass.
'Ho look, i can't control my party members, like in real life, ho soo realistic, this is great roleplaying, wheeee'.
By that standard, Oblivion it's the pinnacle of a roleplaying experience.
How about this: the minimal (if any) roleplaying benefict of having non-controllable NPCs was completely overshadowed by the total and utter destruction of gameplay.