He's been on a decline analytically the last few seasons. This year, his individual impact on xG's has been pretty consistent with previous years, but his 5v5 Sh% is down around 2%. His average is about ~11% throughout his career. That's certainly not likely to continue to be that low.
In years past, he was able to get get good scoring chances consistently. But so far this season his chances haven't been as good, nor have they been as frequent. That also plays into the lower sh% as well.
It's not like he's cooked, but he's been showing signs of decline over the last few years, and this may just be another step towards that direction. We'll see as the season moves forward.