Sounds like many (the rational ones anyway) fault Pioli more for not having a backup plan for a guy who obviously didn't have much of a track record, and most importantly sticking with the guy when the performance was unacceptable after a few years. In other words not owning up to it being a mistake when the evidence became pretty clear.
Which is all I was really asking. Those who thought I was trying to defend Pioli have it wrong. First, if I try I'm just going to piss everyone off (see this thread), second, Pili will succeed or fail on his own. I'm not here to convince anybody of anything. I thought getting Cassel wasn't that bad a move in 2009 given the other options available at the time, but it sounds like the real crime in the eyes of most was sticking to a failed plan.
"I love signature blocks on the Internet. I get to put whatever the hell I want in quotes, pick a pretend author, and bang, it's like he really said it." George Washington