Then you have Havertz, who played well against Barnsley but has struggled so far against premier league opposition. You still have to integrate Hakim Ziyech into the squad, not to mention an adjustment to Christian Pulisic's role.
You also have the rest of the contenders. United seem desperate to make additions, Manchester City and Liverpool look like locks for the top 2 and Tottenham have silently made very impactful additions. You have an Arsenal team playing as well as anyone and Wolverhampton and Leicester City both have teams capable of sneaking into the top 4.
If Chelsea starts this season slowly, it will be a monumental task to get back to the top-4 in a premier league that is the most competitive we have ever seen.
I still think Chelsea have a great team and a great manager, but it is all too much too soon. I expect them to start this premier league season slow, and that will cost them a top-4 finish.