Yeah, I'm a little confused myself here too, and I'm not sure Dreger is talking about.
First, if Dreger's wording is precise and Schenn has to play 25 minutes or more in all of 82 games, and not just average 25 minutes over 82 games, then technically all the Flyers would have to do would be to not play Schenn 25 minutes in his first game. That would nullify any chance he has at achieving the bonus and thus reduce his cap hit. It serves the same purpose as sending him down but you don't have to send him to the AHL.
Second, and this makes my first point completely unnecessary, I'm not even sure "playing/averaging 25 minutes or more in all 82 games" is even a potential bonus in the CBA. All the possible "B" bonuses are clearly outlined in the CBA and it's not there. A player can get a bonus for winning a major award (or just finishing top-5), like Toews did when he won the Conn Smyth. A player can also get a bonus for finishing top-10 in goals/assists/points/points per game. The only place it mentions ice-time as a performance bonus is in the "A" bonus section, and even then it's a little different from what Schenn apparently has. Schenn would have to finish top-6 in ice-time among forwards and the maximum amount payable for achieving that bonus is only $212,500.
Third, Dreger posted this at the end of his article about the situation:
In the third year of Schenn's contract, he doesn't have to play the 25 minutes in all regular season games to earn a handsome $1.5 million dollar bonus, but to qualify he would have to have an All-Star season, finish among the league's point leaders and win a major award.
The CBA states that a player is automatically eligible for a performance bonus if he has an All-Star season, finishes among the league's point leaders, and wins a major award. He wouldn't have to achieve all 3 in order to get paid.
So yeah, something seems fishy here. Maybe I'm interpreting the CBA wrong here, but I'm not sure. The CBA does state that a player and club could negotiate their own bonuses for the League-wide Awards/Trophy Bonuses and League Performance set out in the CBA, but it doesn't mention anything about creating a new criteria to meet or making it mandatory to achieve 3 different types of criteria before earning a bonus for them.