Put Mina in that side with those tactics and he had better be fantastic because he would be exposed all the time - Zouma and Holgate were bad today but they had no cover and only rarely were Kenny and Digne even in a position to help them out. Better teams than West Ham would have given us an absolute shoeing.
Gomes on the other hand is the key and has to be given time because we have noone in midfield that deserves to keep their place at the moment, however we are set up.
Personally I'd have three at the back (Zouma / Mina / Holgate), the two full backs (Digne and Coleman), Schneiderlin and Gomes in the middle and a front three of Richarlison, Tosun and Walcott.