All big teams have very good players on their bench. Villa, Sanchez and Pedro are often exchanging their bench time. Chicarito and berbatov used to exchange bench time and sometimes even rooney was on the bench last season. City had Dzeko and Balotelli on the bench. Madrid had the likes of Kaka, Modric , Marcelo on the bench and it looks like Ozil might join them. Juve used to have Del Piero and Mutu coming from the bench.
We'll have 3 very good, potentially world class, and one mediocre guy next to them. This is perfect since we should be competing on all fronts and Conte lets the likes of padoin peluso and giach get some play time and we wont have to drop down to the level of Quags and Matri as soon as one of our forwards gets injured or falls into a slump of bad form.