Roles in special teams

Adding 1-3-1 powerplay and 1-1-2 Penalty kill systems are pretty great. Still, I think that the execution are a bit lacking. Especially the powerplay squads are one 5 men unit, which is nicely 

acknowledged in the team strategies menu, but during the gameplay if you are not quick enough your team may end up using second pp unit's d-men and first unit's forwards. Obviously that will ruin the roles. While talking about roles I kinda want more information in what they actually do. Sometimes I have seen my finisher lifting their stick up, but is that because of the role? What does puck carrier do? I know what he should be doing, but honestly I haven't seen my puck carrier swinging behind my d man waiting for the drop pass. is the distributor easily available constantly or does my team do something different when he has the puck? Also we still need the role of faceoff taker. I want my first unit's center to set up in the bumper position (which is by default leftwingers position for some reason), but currently I am forced to use him as the guy who operates behind/in front of the net. Penalty kills are a bit of a mystery to me. Sometimes I have the proper lineup and sometimes I have seemingly random players.

TL,DR: Updating special teams is a good step, but roles are a bit lacking. More customizing and information needed