Like I said, Chelsea and Manchester United have not really made any progressive moves in the transfer market.
Liverpool sold three attackers including one of their most valuable players. Mane was a workhorse that also contributed goals. I think they will feel his abscene in the squad. Plus they don't have any serious depth. I think Klopp has gotten the best out of this squad as constituted. You would need to make a move like City did for Haaland in order to stay at the same level or improve further. Mane has been proven in the Prem, Darwin Nunez has not.
Arsenal have made some good transfers. Gabriel imo is a steal. He is an underrated striker (remember he often came off the bench). He has the potential to be the top scorer in the league the way Arsenal attacks.
Chelsea have not improved at all. Sterling is not really an improvement and there is a lot of uncertainty in the locker room. I think the team will struggle this season. United have not improved at all. They even had Ronaldo publicly wanting out. They aren't able to attract the same talent anymore.