Allegri probably wants to make a slower transition to a new formation. the key players are still the same from last year and they have been playing only the 3-5-2 and nothing else for around 3 years now and its hard for a new coach to force something new right away AND keep the results going. Allegri picked a safer way, keep the formation that brought all the success in the past 3 years and he is probably gonna start using a new system more and more as time passes. we'll see how thing will go. if we pass the group then i guess we will be more unpredictable in the KO stages as we will (hopefully) play a new system
