For moi, DD definitely has the experience as a player. No doubt credits will be given to him for what he's done with Monaco, excellent performances they've given.
But I never believed in one-season thing, I like to wait. Yes that sucks but hell I'm just giving my opinion anyway
From Monaco to Juve is a big difference and though DD knows how Juve works as they maintain very high professionalism, the pressure of coaching Monaco and Juve are still different and DD could either make or break at Juve.
Therefore not willing to risk any chances, I would gladly see him stay at Monaco for one more year and see what happens if he coaches Juve for the following season