Some players need match fitness, some players need more training and more recovery, and some players need to recover and focus their training for Saturday against Brighton. So there was always going to be heavy rotation today.
Hopefully they score some goals and get the result they should and can totally focus on the PL match on the weekend.
Feel like Maguire needs a lot more rest this season, especially with his first CL campaign. If he breaks down, United are totally fecked, so they really have to manage his minutes more than ever.