https://www.thisisanfield.com/2017/12/Jürgen-klopps-liverpool-evolution-taking-shape/Thought this was a good article about the evolution of Klopp's squad from the beginning until now. I won't paste the whole thing, but the starting lineup and bench in game 1 back then vs. now is striking:
Oct. 2015 vs. SpursGK: Mignolet
D: Clyne, Moreno, Skrtel, Sakho
M: Lucas, Can, Milner
F: Lallana, Origi, Coutinho
Subs: Bogdan, Toure, Randall, Allen, Teixera, Ibe, Sinclair
All of the subs are gone, and 7 of the 11 remain on the roster.
Dec. 26, 2017GK: Mignolet
D:Alexander-Arnold, Matip, Klavan, Robertson
M: Can, Wijnaldum, Oxlaide-Chamberlain
F: Salah, Firmino, Coutinho
Subs: Karius, Gomez, Lovren, Milner, Lallana, Solanke, Mane
So 5 of 18 from that first match in Wednesday's squad, and 8 of that 18 still here at the club (with one, Origi, on loan). Then 10 of Wednesday's 18 were already here when the first match was played.
When I look at Wednesday's squad, the only question marks (for me) as to the next few years at LFC, are players who were already here when Klopp arrived (Lovren, Milner, Can, Mignolet - even those for me I have no problem with staying here as bench players). Only Gini seems possible as a Klopp buy who is more of a squad player.
I think we're getting pretty close, and I look forward to another add or two, although probably not until the summer.