Conte had issues moving Juventus from a 3-5-2 to a 4-3-3, wouldn't say he's that flexible tactically as his poor record in Europe shows; Allegri is showing him up there big time (both from his time at Milan and Juve).
I think he's a good appointment for them too but it remains to be seen if he can translate his methods into a different country for the first time in his career, even more so that he doesn't have Marotta at his side.