Cassel is a minor issue in my opinion of Pioli.
The real problem is, we thought we hired Da Vinci, and he keeps giving us Crayola paint-by-numbers replicas of the Mona Lisa to hang in the gallery.
Pioli doesn't know how to build a football team, he's just a guy that's seen it done. He hasn't taken what he's learned and tried to apply that knowledge to the curves he faces in his new situation. Instead, he's taken an inflexible straight line, regardless of where that takes the team.
He's failed in nearly every major decision he's made in KC. There are almost zero great GM moves, a lump of mediocre moves, and a crushing avalanche of terrible moves.
Pioli is a fraud.
Courage is not the absence of fear but rather the judgment that something is more important than fear.
The brave may not live forever but the cautious do not live at all.