Problem with Ross is, he's awful defensively and looks scared to put a foot in, also doesn't have the discipline and the general work rate to track back. For me he is not a CM until he atleast makes an effort to work out of possession.
I think he is more of a number 10 myself, only issue is he has poor assists ratio and tends not to get his head up and look for runners to pass to. Maybe that will come with experience, who knows.
One aspect can be learnt, the other aspect is just laziness, and if he doesn't do
It with the young legs he has now, then I doubt he ever will.
Number 10