As opposed the 13 game sample size where he has 3 points?
I don't disagree that his start this season has dampened his trade value a bit, but I think the amount it's hurt him is overstated. Palmieri just turned 30 a few days ago, so there really shouldn't be any age-related decline at this point. He's streaky, but has consistently produced each season for the Devils - scoring at exactly a 30-goal pace over 82 games over his first 5 seasons in NJ, including a 31.5 goal pace last season (in 4 of those 5 seasons, he's scored goals between a 29.9-31.7 rate over 82 games).
Palmieri came off a 10-month layoff with no pre-season games and his usual center out with an injury. They also had a 2 week+ break due to the COVID outbreak and there's a new coaching staff in place. It's an odd season all around, so no surprise that some players are struggling. Let's see where his game is a month from now as the TDL approaches.