Conte wasn't a winner as a coach before he joined us, and Allegri wasn't exactly much used to win also.
I think we have no problems in making people who is not used to win getting used to it. See Vidal, Pjanic and countless examples. As long as the Italian backbone is there, we'll keep winning and guys will settle in.
I think Spaletti is a great coach technically wise. Don't know about his leadership qualities, but if he has it, I like the choice.