Just to give some people an idea of what Jankowski has to work with I am went through all the box scores for Providence this year and made note of his linemates for every goal that was scored while he was on the ice (for and against), this should give us an idea of who he plays with on a nightly basis since we aren't fortunate enough to see him play.
Jankowki appears to be playing the majority of his time at even strength with a combination of Derek Army (3 goals, 5 assists), Kevin Hart (2 goals, 4 assists) and Conor MacPhee (2 goals, 2 assists), now just so we are clear here, his 3 most common linemates have a combined 7 goals and 11 assists, when Jankowski has 7 goals and 4 assists himself. Jankowski is 3rd on the team in faceoffs with 250 taken, Mauermann who is clearly the teams #1 centre has taken the most and Acciari has taken 261, this leads me to believe the Friars may have no defined #2 and #3 lines and play the Jankowski and Acciari lines fairly evenly.
On the PP he seems to play evenly with 4 different forwards, which leads me to think he splits his time between the 1st and 2nd PP units.
So Jankowski is the teams 2/3 centre, and sees time between the 1st and 2nd PP units. While doing so he has 7 goals (2nd on the team) and 11 points (4th on the team). It seems to me when you look at his numbers in some context rather than just raw numbers they really aren't as bad as they are made out to be.