Tevez's deeper role is working very well so far.
I always like getting talented players out of the crowd and in a position where they can get the ball facing goal, but that can involve moving them into areas where they are less likely to get in goal-scoring positions.
But if you look at the goals Tevez has scored in the last week against Udinese, Malmo and Milan, his deeper role is allowing him to see situations developing and pick when to burst forward to get chances.
Playing with one striker behing the other is probably the key adjustment that Allegri has made that I like. Conte tended to have the two strikers both playing up against the defence and it made it very hard for them to get the ball facing goal on any sort of regular basis.