The short answer is no they haven't.
Kerkez / Frimpong are not upgrades on their previous players. Kerkez looks a liability tbh.
Wirtz replaces the creativity of TAA but at a structural / tactical cost.
They've lost Dias, Jota, Nunez and signed Ekitike and potentially Isak. But neither of those lads are going to play on either wing.
Guehi is another overrated English player who is pretty well protected in the Palace back 5. He's shit in the air but decent on the ball.
VVD isn't going to get better, he's going to get worse. Konate has started the season like he's Mangala's little brother.
The fluffing of Liverpool is all down the noise around Isak and the early signing of Wirtz. But overall if you listen to their own supporters, they aren't happy. Isak isn't anywhere near enough to cover their weak spots.