If benching Ghost for a couple games destroyed his confidence, bye bye. He'd never make it in the NHL if he's that weak willed.
Provorov didn't get benched because he had the mental toughness to bounce back and the focus to quickly learn from his mistakes and improve.
Most of his mistakes were physical, getting used to NHL speed, otherwise Provocop has a hockey IQ that's off the charts, even when he was struggling, he was fundamentally sound with his positioning, body use and angles.
Ghost has never been fundamentally sound like Provocop, he's overly reliant on his speed to cover for his mistakes, he would stick check instead of taking the body and riding the opposing player past the net and preventing him from getting a shot off. Later last year, Ghost did start playing better defensively, taking better angles and playing his man, not the puck. He's going to be limited by his size, but his quickness and agility allow him to be effective in "open" ice when he plays responsibly. However, you don't want him on the PK or at the end of games when opponents gamble and throw an extra man into the O-zone.