What do you mean? Saad clicked great with Kadri and Burakovsky. That was a very good line. They were just trying to balance out the scoring, and didn't want to break up Naz and Burky.
And why are we saying he's underperforming? He's on pace for 30 goals and the same 50 points he gets every year. And he's coming off a stretch where he had 10 points in 9 games.
Nuke has replaced him very well though. At his age, with his better defense, and better forechecking, he'd be the better signing if he comes in around the same price, and can continue producing around the same 20+ goals and 40-50 points.