Sounds like a good counter move. Stepan is playing on a solid New York team, points are going to come across well for him, even if he's playing on the mid lines. Hartnell is hartnell, you know you will get points from him.
Kopitar seems like the right type of bait to get those players. He has 47 points but is playing on a up and down LA team. Trade seems like it would be in your favor in my opinion. Good luck to you.