I don't think Smalling has been brilliant, he has been promising in the games he has stepped into. Against Spurs Rio was exposed because Evans and in particular Rafael made poor decisions in the initial movements leading up to the second and third goals. It could have been Evans who was exposed to Bale and then Defoe....the outcome would still be the same.
When you say used wisely do you mean in the big games? Champions League perhaps?
Would it? I was at that game, and it looked like Rio was well off the pace. Perhaps you're right though.
I'd just like to see Smalling get his chances beside Vidic, as I think that they would also work together very well. Smalling may not have been brilliant, but he's gone beyond the promising stage for me. He's a very composed and reliable young defender.