The new season should be more challenging because all the teams are trying to be stronger. If Juventus still wants to compete for the title and stay in UCL zone, they must be stronger and perform more consistently in the next season. By the way, I don't see something special with Roma, this team is almost similar with Juventus. The problem of these teams that they couldn't play consistently in the whole season. If there is no change on these teams, I doubt if these teams can surprise us in the next season.
If in fact things with Juve have to be better for this session because I personally have seen that the teams are getting in very good shape, reinforcing themselves above all, but Juve have history and with the money that was not much that they won in the World Cup they have to make very good purchases, AC Milan have already taken Modric, he is a great player, he will give another vision to football in the team, Juve must look for new blood to refresh.
We can see that all teams are improving for next season, but no one knows what will happen. It could be better or worse. Players come and go, which can have a significant impact on a team's performance.
Juventus and AC Milan are two teams looking to achieve their best form to win titles, but that won't be easy, and the changes made are still open to change.