I think he just needs to re-focus his game and what he's good at. Posted recently that he seemed to drop deep after the re-start and wasn't affecting the game as he should.Rashford can be excellent but has his limitations. He's got a very high peak and a low trough which is generally affected by the type of game we're playing. He'll get a lot of game time as there're games that he's devastating in.
Rashford should be isolating defenders, making runs, linking with Martial and his overlapping fullback. Not pinging long balls from the half way line. Not sure what that was all about to be honest.