Barcelona needs someone at the left wing but that are doubtful about his performance that's why they are getting him on loan for now on a season long loan and if he plays well then they will make the move permanent. It is a good move for him he just needs to adapt as fast as possible.
There’s one thing in a team, which is making some players lose form if the team that he is playing for is not that good. Even though that player is great in terms of performing well, it will later come down, and that’s exactly what is happening to the Rashford performances. Because if we look at how Manchester United has been playing very poorly all season, people don’t need to criticize Rashford, but let’s see since he is now going to be playing for Barcelona on a loan, which is for the main time we can see either it can be able to use this opportunity to bring back his former performances to Barcelona so that they can directly sign him into the club.