I didn't watch any Serie A last season but have the impression that it is a one club league with Juventus winning their league every season.
If you look at Juventus playing stats, it looks like Alves was used in the Champions League and a squad player in Serie A. Perhaps he could play every week, but unless he was injured, it doesn't look like Juve tried to do that. As the Premiership is more competitive this just adds to the impression that we'd need a 2nd right back.
I doubt City are very happy that news of this deal go out as it might make a deal for Walker awkward. If you were in a team that is playing in the Champions League, would you go to a side where you might not play in the Champions League?
I wonder too if this deal is as advanced as claimed as Juve may not want to sell him. There other right back Lichsteiner is old