After seeing the playoffs this year, I wouldn't keep half of that defense. Not because they suck, but because the balance is completely off. You need two elite puck movers, and four players with size and physicality to have any chance of winning the Cup. It's a completely different game.
He was awful defensively this year. Took a large step backwards compared to last year. The parts of his game that will translate to the NHL are hitting and fighting. If he can't work on the defensive side of the game he may be better served converting to forward. Could be a Prust type.