Another weakness is allowing early scores and long drives by the other team.
Interesting data from Pro-Football Reference on 2016 opening drives:
https://www.pro-football-reference....d_quarter[]=2&tr_gtlt=lt&minutes=15&seconds=0
Shows a few things:
1. Opening drive scoring success was bottom third of the league.
2. Average starting field position was near the bottom of the league.
3. Average point differential when starting their first drive was near the bottom of the league.
4. Yards gained was closer to the middle of the league.
5. Opening drive success (at least for 2016) was not a good predictor of team success.
Falcons and Patriots had the highest success on their first drives and made it to the SB, but Chargers, Bengals, Colts, and Eagles were nearly as successful and all missed the playoffs. Meanwhile, the Texans, Dolphins, Raiders, Giants, and Seahawks had limited success on their first drives and all made the playoffs.