For me the biggest problem relates to the acquisitions. Yes they are perfectly serviceable squad fillers, but their age profile is concerning.
We all expect Richarlison to be sold next summer, and I would imagine that if we have a poor season, there is a good chance DCL will request to go too. IF that happened, we would also be losing (not necessarily a bad thing) James, Sigurdsson, Branthwaite, Kenny and Delph at the end of their contracts. Plus players like Allan, Mina and Gomes will be in the final year of their contracts.
We will be left with a 33 year old Rondon, 31 year old Townsend, 60 year old Begovic, plus Seamus will be getting his bus pass etc.
The nature of the signings and the existing squad actually leaves us with an unbelievably large amount of work to do on the squad. And even if we sold Richarlison and DCL for good cash, it won't be easy to bring in that many players. I didn't want Benitez at all but the club should be giving him a chance to succeed.