If we're talking about the midfield up then Aguero, Jesus, Kelechi, Sterling, Sané, B. Silva, Sanchez, D. Silva, De Bruyne, Gundogan, Touré, Fernandinho, Aleix García, Fernando, Delph and Roberts all in one team is ridiculous. That's assuming Nolito leaves. Pep will do very well to keep them all happy.
I think Kelechi, Nolito, Fernando will leave. Delph might stay as he is homegrown. Dinho will be replacement right back.
If this is true and I have my doubts given that Kun is definitely staying then for 6 spots ideally we need 10 players.
Yaya, Gundongan, KdB, Silva, Bernardo, Kun, Jesus, Sane, Sterling and Sanchez. Which means Roberts out on loan, Garcia ditto. Delph reserve left back.
I agree this is difficult to sort out especially if another more defensive midfielder comes in.