I'm not worried about Risto's first two years. All things considered he's right on track in his development which is above average to this point.
In todays game it is happening more and more but 18,19,20 year old defensemen don't play top 4 minutes in the nhl against other teams top lines most nights.
I have no issue expecting Risto to improve going forward because I think he's the type of player who wants and expects more from himself.