When you are a big bloke people automatically assume that you are a DM, which Fellaini is not. He can't tackle to save his life, he makes Paul Scholes look brilliant when tackling.
People keep saying he's a handful when playing as an AM what the fuck does that have to with creating chances and scoring goals. At the most he just annoys defenders and win a lot of knock down headers. For fuck sake Andy Carroll is a handful but that doesn't translate to goals for him.
Lastly he can't play the B2B role, he's not mobile enough or have the stamina to move from box-to-box.