Ronaldo hasn't suddenly changed in to a player that needed support-
He was a player that always needed support.
First - if he was always a good striker, why didn't he play as a striker earlier on in his career? Because he ultimately lacks things like hold up play, interlinking passing, central dribbling etc. The sole reason he became a striker is because he had a great finishing ability and aerial ability and had to utelise that as his pace and dribbling died down.
If he could have done that all by himself then the need for Benzema as a central striker holding up and making passes wouldn't be needed. Rooney was the same, a player that supported Ronaldo.
So why do I bring this up?
If Ronaldo needed the support of a CF/SS when he was at his prime as a LW -
Why do people think that he doesn't need one when playing centrally as a central striker now past his peak?
Ronaldo as a Striker is not a Benzema or Rooney capable of setting up Rashford or Greenwood, whilst Rashford and Greenwood are not a Benzema or Rooney capable of holding up and making passes in to Ronaldo.
Ronaldo needs a support more than a creativity- a support we were not really fussed about having because Greenwood, Rashford, Bruno, Martial, the potential signing of Sancho were playing more direct with dribbles and getting in behind the defenders - not having chances created in to a pure central striker that has no hold up play or interlinking passing.
The guy is an absolute legend but he has caused us problem we didn't have before - creating a whole new level of team or support purely for the way Ronaldo plays, a way that our forwards were not playing before.