Guys who score just enough to seduce HCs into playing them, but are net liabilities because of their defense, are how you stagnate, they eat up more cap room than they should and block other young players. And most never become good enough scorers to compensate for their deficiencies.
Flyers were smarter about that, Laughton's first season at 21 would have kept him in the NHL for a lot of franchises, 21 ES points in 71 games in a 4th line role, instead they sent him down to the AHL. He returned at 23 and scored at the same rate, then improved over the next two seasons - but his fundamental defensive flaws haven't been fixed b/c they seem to be innate (lack of instincts). However, by seasoning him they limited the damage. He's a top forechecker and PK forward, just can't play center in the top 9.
Bunnaman is willing to forecheck and play defense, his offense needs a lot of work, but at 4C he can be a net positive while he learns the ropes. Same with Rubtsov if he can stay healthy.