Yes but if you calculate the number of goals we've conceded from set pieces and divide it by the number of goals we have conceded in total, I am sure it would make a bad reading.
When you are conceding 30% of your goals from set pieces, you have a problem.
We conceded only 22 goals in serie a, 6 out of 22 ~28% were from set pieces, so it's almost every fourth goal
Juventus 2-1 Verona - corner
Cagliari 1-4 Juventus - corner
Juventus 4-2 Sampdoria - corner
Juventus 3-1 Inter - corner
Verona 2-2 Juventus - both goals after free kicks
And 4 goals out of 12 in CL/EU were conceded from set pieces so it's 25%, every fourth goal too, it's WAY too much
FC Copenhagen 1-1 Juventus - free kick
Juventus 3-1 FC Copenhagen - long thrown in
Juventus 2-1 Lyon - corner
Benfica 2-1 Juventus - corner
And we doesn't improve, everytime we are doing the same mistakes - bad marking, Bonucci vs. Garay, Marchisio vs. Garay and so on