Slafkovskys first season in the NHL he did 10-13 minutes a game usually. I can't remember perfectly but looking at the most common linemates he was usually playing with the teams 3rd and 4th liners. Then he got injured, and started the 23-24 season getting around 13 mins a night again. Eventually he got his ice time bump and then the production again.
So far Demidovs KHL season is starting like Slafs NHL rookie season (in terms of TOI anyway Demidov is hovering around 10 mins a night). He's also coming off a serious injury last season. It's the second best league in the world, so maybe it's not the end of the world easing an 18-year old playing on one of the top KHL clubs into the league for the first couple months.
So far Demidovs KHL season is starting like Slafs NHL rookie season (in terms of TOI anyway Demidov is hovering around 10 mins a night). He's also coming off a serious injury last season. It's the second best league in the world, so maybe it's not the end of the world easing an 18-year old playing on one of the top KHL clubs into the league for the first couple months.