Fred has played well in his few appearances. We need to be playing a 3 man midfield in any case. A midfield of 2 consisting of Matic and Pogba doesn't play to Pogba's strengths and Matic can't play the DM role by himself at this point or at least this season.
I don't think Matic has been as bad as the schtick he gets on the caf, but I do think we should be giving a 3 of Pogba, Fred and Herrera for now. This gives us a lot more energy in the midfield. Then just rotate the best 3 in-form attackers up front. We don't have a target man type of ST, no matter how much Jose wants Lukaku to be his next Drogba, that just isn't his game.