Aubameyang may strengthen Chelsea's forwards, but Chelsea's defense is also weak. In 5 matches they scored only 6 goals and conceded 8 goals. Hence, Chelsea management should take appropriate steps quickly to strengthen the defense as well. Otherwise, Chelsea should change their match strategy.
Chelsea must realize their weakness at defense line, that's why they sign Wesley Fofana. I assume Chelsea defense will be strong again with some new players. Their strategy will be more effective with new experienced and skilled players. Just wait for an improvement on Chelsea perfromance in the next few matches. Be calm!!
After Manchester United managed to get out of a bad record, now Chelsea are experiencing a decline in performance, defeats to Leeds United (3-0) and Southampton (2-1) indicate that Chelsea's back line is very fragile. Tuchel must immediately find a solution to prevent more balls from getting into their net. The arrival of Wesley Fofana could mean a change at Chelsea's back line, but several other players are also needed. Chelsea must immediately complete their squad to be even more solid, they must move quickly before falling deeper.
Not only the back line but also the front line is so bad. 6 goals in 5 matches for a club like Chelsea with some great names in the front line is not acceptable. Now they must be regretting their activity in the transfer market. A hard homework for Tuchel, he should find a way to fix the problem as fast as possible.