When Ronaldo was first signed, SAF balanced things out by playing Tevez and Rooney upfront and Park on the flank. When things got tough he would introduce Fletcher in the team. During his last season he would play Cleverley not because the guy was particularly talented but because he provided legs that an ageing Giggs/Scholes and Carrick needed.
What Ole inners (including Gaz) can't comprehend is that workrate doesn't come out of thin air. Its a trait just like dribbling or having an eye for goal. At this level it becomes a skill or else you'd have players like Robbie Savage or Fred who run in circles like a puppy after a stick. A responsible manager doesn't expect a high level of work rate from every random player he has. Ronaldo, Nani and RVN had nowhere near the work rate the likes of Ince, Park and Keane had.
United already had its fair share of attacking minded players. VDB, Rashford, Bruno, Greenwood, Pogba and Cavani made us very attacking minded especially in a team with 1 ageing holding player and 2 very average B2B players . To add Ronaldo and Sancho to it as well was set to destabilize the system unless of course we improve the work rate significantly. That meant, Pogba would have to be shown the door and a DM (Rice?) and a deep lying playmaker (Neves?) added
This disaster is all Ole's making, a naïve mistake from inexperienced manager with too much money on his hands.