while i agree on the performances of those teams as you say, you have to assume that like we do, they will get better as the season goes on, work out their team balance (Scousers for instance with their midfield). Arteta seems to be experimenting a little at the moment - but again you have to assume that he will probably work it out at some point and their performances will improve.
Conversely, we normally under Pep start a little disjointed and then become a wrecking ball who cant be stopped -but this season we have started stronger (not near peak performance but still a lot more solid).
I think the "fear" with some people is injuries - losing KDB so quickly for a few months has only heightened that fear and losing Rodders for some of those big games (CL and Prem) would see us struggle more....just being able to rest him would be a huge bonus. You also have to factor in the Stones issue....brilliant player but you know he is going to pick up injuries through the season...so you are nearly guaranteed to be at least one player short at some point throughout the season.
Agree we have had a decent window (the additions have all been absolute class so far) - but not maybe the window that even the club expected/wanted so far?? They may have been blindsided by the Saudi involvement in the market (for instance would Mahrez have left if it wasnt for that?) ...the caveat to that is that if you stand still in football,then realistically you are moving backwards....