Probably so. But a LOT of posters here make such a big deal about the QB completion percentage stat.
In Jim Kelly's years as a Bill his completion percentages were as follows:
1986 59.4 (With Andre Reed, Pete Metzelaars, Chris Burkett, and Jerry Butler as his receivers)
1987 59.7
1988 59.5
1989 58.3
1990 63.3
1991 64.1
1992 58.2
1993 61.3
1994 63.6
1995 55.7
1996 58.6
His completion % Lifetime in Buffalo was 60.1
Josh's for 2018 was 52.8 while playing with hands of stone and unmotivated receivers.
I'm feeling pretty good about Josh's chances for improvement.