They had limited off-season/fall camp practices. So they basically came in as the same players as they were last year in college.
If you had,
QB - Joe Burrow
RB - CEH, James Robinson
WR - Lamb, Jeudy, Aiyuk, Ruggs, Jefferson, etc.
DL - Chase Young, Javon Kinlaw,
ETC.
They've all shown they can play early in the season with minimal NFL experience. I think if you put them together last year as a team and gave them a month or two to practice, they could give a team like the Jets a run for their money.