It's Impact. He will never have the ability to take over a game, or really take over a shift, but he still needs to find a way to impact the game outside of his assists.
Once a game, nearly every game, D-Step makes a beautiful takeaway. His vision for IQ for interrupting a breakout is terrific. the problem is how rarely it becomes anything. A weak shot on goal or a forced pass, and it's an opportunity wasted.
Contrast with Hags. Well, on his better days. He doesn't usually show up on the score sheet. He's got a decent wrister, and par for the course passing, but he's not an offensive force as it stands. But he impacts the game, especially the forecheck.
This is why I'm still confident in Stepan. Forecheck, balls out play,puck battles (HUGE for this team) can be improved, worked on, and don't always develop early. His vision and creativity? That's something I don't think they can just give to a player.
But he has to complete his game. He can't simply be the set-up guy if he can't CREATE offense. it's his 3rd season. he's shown moderate improvement in his second, but once again seemed to be a non factor in the playoffs. Stepan CAN be a legit 2C, and maybe a 1C if he can round out his skill set. It's a big IF though.
And for the record, I think Ryan O'Reilly is better than Step, but not Adam Henrique. He might be in the future, but not right now.