I think he has been brought in as backup for the midfield not the front 3.Thought Mooy would be a good option in the two behind the front man when playing away at a top six side but after Potter brought on two strikers when we were 1-0 up, who needs to shore anything up! I do see Mooy as similar to Gross though in so far as he's got good movement, assists and set pieces. But he could play instead of Propper two as can defend (had to a lot at Huddersfield!)