If we are to be using earlier performance to determine league winner, I think Arsenal will always be the league winner of EPL. Arsenal is found of being very serious at the beginning of the league but then looseguard and relent as the season progress without sustaining the energy till when necessary.
By the way, did you mind checking the lineup that played against Sevilla and the one that played against Las palmas? I just checked now and you can not expect the same results when you feature different players despite that the team strength also matters. I don't want to comment on Liverpool at the moment until season starts.
Liverpool played two matches in one day, it is clear that Slot would not use the same players in different matches, why do this right before the start of the season, excessive workload for the players can be too dangerous. But at the same time, Liverpool did not lose in any of these games, these are friendly matches, but it seems that the match with Sevilla was more important, since the composition of players for this match was closer to the main one.
Early results, are these early matches? It seems to me that Liverpool now looks even better than Arsenal, well, and City, as always, will also try to take the leading positions from the first round.