Denis, Gomes, Paco, Samper, Marlon, Mina out.
Alena, Miranda, Munir and Rafinha, should be promoted/kept.
Add a WC midfielder (De Jong, Thiago or Pogba) and the team would be:
1 Germany GK Marc-André ter Stegen
2 Portugal DF Nélson Semedo
3 Spain DF Gerard Piqué (3rd captain)
4 Croatia MF Ivan Rakitić
5 Spain MF Sergio Busquets (vice-captain)
6 Brazil MF Rafinha
7 Brazil FW Malcom
8 Chile MF Arturo Vidal
9 Uruguay FW Luis Suárez
10 Argentina FW Lionel Messi (captain)
11 France FW Ousmane Dembélé
12 NEW MIDFIELDER
13 Netherl. GK Jasper Cillessen
14 Brazil MF Philippe Coutinho
15 France DF Clément Lenglet
16 Brazil MF Arthur
17 Spain FW Munir El-Haddadi
18 Spain DF Jordi Alba
20 Spain DF Sergi Roberto
21 Spain MF Carles Alená
23 France DF Samuel Umtiti
24 Spain DF Juan Miranda
25 Belgium DF Thomas Vermaelen
That is a solid team perfectly balanced and with the ability to challenge on all fronts.