"Ain't that good" as in "most likely isn't good enough to guarantee 40 points by Christmas" rather than "he's shit".
Teemu Pukki had five goals by this point last season as well. Where's he now?
Comparing against last year and using 40 points as the mark of safety we would have to be in 2nd position to be guaranteed safety by Christmas. Ollie Watkins might bang a few in but he ain't that good.
Top 6 as of 22nd December 2019: