We are likely to need our full squad in a 46 game season so I would make some changes however I think it is important for us to start building partnerships so would use this game to do that. With our midfield, i'm not sure i'd be playing 442 however Big Dave seems to want to play that way so with that in mind, I would go with this:
Johnstone
Nyom
Bartley
Dawson
Townsend
Burke
Barry
Field
Chadli
Rodriguez
Gayle
Myhill, Adarabioyo, Hegazi, Livermore, Morrison, Barnes, Robson-Kanu