It's because he's playing with the puck hog Grabovski.
Kadri is a MUCH better centre for Frattin.
Kadri is a better center for any winger right now but Kadri can only play on one line... for now
Grabovski definitely has been in a funk offensively. He's not making the good plays offensively and complicating a lot of them. I like his speed and forecheck... but his offensive game has been pretty disappointing.