For me Fernandinho has to go.
I don't care how good he is individually(and I think he is very overrated for his graft tbh), he's old and simply does not fit into this system.
All season long, we've played our best football without him.
At worst, it's him or yaya and not him and yaya.
But at his age, move him on and let Gundogan, Garcia and a.n. other contest for that role in the team.
There is no chance Fernandinho will leave this summer.