The great advantage for Juventus is about the more potential they can have in the Serie A. In fact, Juventus is not playing in the Champions League like Inter Milan and AC Milan which can give them more time to rest between each game also they will have less chance of having injured players. Maybe we are going to see Juventus winning the Serie A title after the drama they had in the last season.
I don't think the absence in UCL makes Juventus to have higher chance to win Serie A title. We can see the last match that Inter Milan still dominated the match although it was held in Juventus stadium. It means Inter Milan still superior against Juventus, they are the team that have higher chance to win Serie A title this season. Sure, with less matches, Juventus players will have smaller chance to get injury. But it doesn't guarantee for the whole players to be in their best fitness. Meanwhile Inter Milan, they still can play in their best performance although there are some key players injured.