For us, with the exception of Mane, we have pruned off players on the very edges of the squad who largely didnt make the match day squad even when fit.
With City it is different as the players they are trying to replace made much bigger contributions. Neither Sterling nor Jesus were guaranteed starters, but among the 5 of their forwards last season the appearances were almost exactly evenly distributed, so neither were the other 3 forwards who are staying “starters”. These 2 are leaving not because they werent getting games or were being forced out, but because they want more of a guarantee of games moving forward. Fernandinho is a bit different, but still played an important role for them. That means there is a lot more of a requirement for Phillips, Haaland and Alvarez to work out. If any of them fail to work out City will be weaker than they were last season.
They still have time to strengthen in other areas (is any LB an improvement over the combination of Mendy and Zinchenko?) that might help, but I think if you’re looking for positives it’s easy to see where City’s risks are.