I just don't think the Italian league is very good this year and when I've watched Juve, i just haven't been amazed.
What's missing in Serie A is one other club that's right at Juve's level right now.
However, that may be the case in a slightly lesser degree with all the league leaders so far this year: Man City -- obviously strong but not nearly playing as well as last year so far, Real Madrid -- similar to City, Dortmund -- looked like world beaters in CL matches but haven't had near the success as Bayern domestically).
However, Serie A is a lot stronger this year than last with Fiorentina and Roma coming on and Lazio, Inter and Napoli improved. Only Milan isn't quite as good as last year but have been improving steadily with all the new faces.
Spots 2-7 in the Serie A table stack up pretty well, after probably La Liga, against the EPL or any league.