I agree that he's not Marchisio, and it should be said that the latter has been very impressive in taking over from Pirlo this season. But I reckon if we still give Ox a chance to turn it around we can also expect 22 year old Pogba to mature, especially given the signs so far this season. He's putting himself about but has improved his distribution to a much higher level, can't really compare him to Vidal but then again there's barely anybody with his skill set.
The power player at Juventus is Khedira by the way, if he can get to his old level and they manage to keep him fit it'll look like a very shrewd piece of business to sell Vidal for 40m and get his replacement on a free. He's been in better form than Vidal has been for Bayern, and unlike Vidal Khedira is actually playing in a new league.
Not exactly a fan of Juve but Allegri and especially Marotta are doing an incredible job.