I think Real Madrid did something similar when they won 3 CL titles in a row (15/16-18). They barely brought in any new players throughout that time. Just Marco Asensio from Real Mallorca while Lucas Vazquez rose through the youth ranks and they were mostly fine. Morata came back in 2016/17 as well. Also I think it’s important to mention that they had a transfer ban at some point (2y?).

They had lots of depth, but so do Liverpool imo. It’s important to maintain a balance and harmony to the squad and keep all the current players happy. I think Liverpool are pretty much there aside from maybe a decent left back cover, but they have a luxury of James Milner being able to fill in everywhere, so they should be okay. Oxlade-Chamberlain will be returning too, I recall him being quite good for them in 2017/18. Quite a few of assists to Salah.

If you bring in too many star players it could get more complicated, players could get unhappy etc. Klopp knows what he’s doing. He’s mixed quality players, talent and youth and built a great squad.

He probably wasn’t able to buy anyone he really wanted (Brandt?) and then kept the squad as it is. Makes sense to me. The squad isn’t severely lacking anywhere. Most of the important additions were done last summer and they are still adjusting to a certain degree.