Addresses like 3 squad problems of Liverpool's midfield at the same time - a DM (something they sorely miss), can play RB too, decent with his feet (and can probably morph into Essien-type in time), at least 2 long contracts in him, not massively breaking bank, has experience in winning trophies and going deep in the CL.
This was arguably the 2nd most important signing they needed, after a solid keeper. They may still need a CB, altho Lovren-VVD vs Lovren-any other defender is like Pique-Puyol/Mascherano vs Pique-any other defender and Matip may prove to be even better.
Not sure they can buy all these with Fekir possibly on the move too.
Klopp has totally turned this club's transfer policy around though. It makes me smile how the result of Coutinho saga and how the whole thing was dealt with is a complete 180 compared to the Suarez or Torres ones.