It's exactly this.
There's evidence we're seeing Slafkovsky at his peak already, a common risk when it comes to players who are physical specimens who don't know how to play hockey.
That's the problem, his strengths and weaknesses continue to be the same as before he was drafted.
That was always the worry with him, he's a physical beast who can and has looked dominant in multi game stretches only to disappear for a long time after that.
The cliche that big players need longer to develop is true, especially the ones drafted for their size more than their finished product. But the other part of this equation is that for every successful project power forward, a lot end up as busts.
Slaf at least isn't a total bust but I worry he might actually be a lot closer to his ceiling than many want to admit - he's young but he's been a pro hockey player for a while now and seems to fall into the same patterns every year. Development can only go so far if he lacks the mental side of the game or cannot figure out how to remain an active offensive player.