Step up against tactics that don't suit him.
Personally, hes had more good games this season than bad. But his good games are generally being quiet for periods as he chases/doesn't chase balls as we are now not playing through the midfield.
Theres been 3 players who have played his position trying to perform the way Koeman wants. McCarthy, Clev, Del. With the one game, Del played well. The other two were horrible and suffered from the same thing Ross does, lack of involvement in the game.
Hes not the focus - Bolasie, Lukaku are. Therefore hes not going to be involved as much. If we're not passing, it loses a major aspect of his game.
Koeman has come out and wants him to play closer to Rom and not drop deep for the ball. Again, for seasons hes been the orchestrator to our attacks, now he wants him to be a "support striker"
But with that, theres no other support around him. You'll be hard pressed to find a 23 year old creative or general midfielder who is supposed to be the main player at a top side who doesnt have support of quality around him.
To me, he doesn't suit Koeman's style and will be out the door with Rom in the summer