We only improved what we were good at except for Giovinco whom I consider as lame as lame can get regardless of his 15 goals and 11 assists and whatever Suns

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and the rest promote him to be.
You should also remember il gol di Muntari and I have a strong feeling that the FIGC will try to punish us for that whenever they get the chance.
And all of this talk started when mentioning that Kaka is back to Serie A, back to his diving and back to giving Milan even more non-existing penalties.
Many are calling me pessimistic these days, whatever, I just don't think winning a Scudetto the next term is as easy as some are making it to be. let's see how much Conte will be banned first and if we will get a forward better than Pazzini (the best forward that I think we might get)
I never said it was easy. All I'm saying is that on the field of play, where hopefully, things will be decided, Juventus is certainly a deeper, more athletic squad than they were even 3 months ago.
To expound on your point that they so far have only strengthened positions on the pitch that they were already strong at.
That is the whole point. Juventus won the title with a rock solid defense and a dominant midfield. Stretched out over three competitions, the moves made were an absolute necessity. Their midfield depth with the acquisitions of Isla, Asamoah, the potential increased playing time of Marrone, and the wildcard that is Pogba, allow Juve to mix and match to the point where the dropoff will be nowhere near as prevelant compared to if they had to field a midfield that composed of Padion and Pazienza for example.
The midfield was great for two reasons. #1) Less matches than their competitors in Serie A last season. #2) A minimal amount of injuries to said midfield. Now, if there is an injury to one of the MVP line, an Asamoah or Marrone can step in, and the impact will be significantly less.
The midfield, more than anything last year, is what brought Juve the success they achieved. It makes perfect sense to strengthen it.
Now, I know that the attack needs a pure goal scorer. Everyone here on this forum is well aware of it. However, that scoring threat is minimized if the midfield were to suffer loss of form or injuries, if that midfield was not strengthened.
You can have all the RVP's that you want on this team, but if that midfield is suffering, a midfield that was so dominant last year that everything flowed through them, then it wouldn't matter.
And in regards to any punishments/non-existing penalties, and the like, I think that you are dealing in variables here. Personally, I can't get upset over things that are out of Juve's control. I can only praise/criticize/analyze what I see on the pitch.
And keep in mind that although another Scudetto would be great, I'm not trying to make it sound as if I would settle for only that. Of course, i would want Juve to make a good run in the CL and Coppa Italia as well, and taht a true finisher would help to achieve taht.