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.
Basically these two teams are equally strong but Juventus cannot easily win the Scudetto because Inter Milan is still quite consistent in Serie A even though Inter has a busier schedule than Juventus at this time it cannot be confirmed for certain even though Juventus has a chances which is good but if they are not able to maintain their consistency then Juventus will not win the Scudetto.
On the other hand if Inter Milan experiences a decline in performance due to their stamina being drained Juventus can take advantage of this opportunity, but maybe not now we can see near the end of the season whether these two teams are still candidates strong title winners or maybe AC Milan and Napoli could provide a surprise at the end of the season because what is certain is that the top 4 positions still have a chance to win the scudetto. There are still a lot of matches remaining in Serie A and it's only about midway through the season.