There's a a small difference between Juve - Barca but there's a huge difference between Juve - Palermo/Parma/USA team.
Also, you say Palladino was not a WC talent. You may be right, but you know what, neither is Andre Gomes.
I disagree about Miccoli, because he offered a whole lot more in other teams compared to Juve. As for Gio, if you were right, I doubt he'd be in the US right now but in some other top club.
Dude, do you really compare Palladino performance in Seria B with what Gomes did in Primera with Valencia? Come on man. Watch Valencia Real 2-1, RM coming from a great win streak (more than 20 games iirc), he was amazing against top-notch team on a run.
Miccoli might had offered more only in Palermo (he was pretty the same in Benfica, I followed him really closely, because I liked him here) where he had a team basically build around him and some other CF, it has nothing to do with pond, it's tactics, player confidence and player growth. Fabrizio was a grown-ass experienced man in Palermo, dont' forget about it.
Again, I think Gio is a head(mental)-case, burden to be next DP was hard enough for him to begin with. Now he has piece, money and fame in Canada, I can understand him totally.
Anyway, the discussion is pretty pointless tbh. Let's agree to disagree.
Look at it for example
It's AM, not some Getafe or anything. Guy is big, quite quick, very good with the ball.
Barca almost plays him as CDM, he is clearly not one. More close to AM even.