Why bringing them back to Manchester United deserves the obvious answer: Antony is loaned out and if a club sends a player away on loan basis, the point is to get him back if the player makes the anticipated progress. But Antony hasn't broken any records. He scored one dream goal and was a nice addition to the Betis team, but that's it. Amorim has to make plans for a whole season. Antony is a player who plays well every so often. That is not what Manchester United needs. I am curious how Amorim will decide.
There are players who find it difficult to fully express themselves in certain leagues. For example, I see that it was very difficult for Antony at Manchester United. And just because he started playing better in La Liga with Betis, it doesn’t mean he will perform the same way when he returns to Manchester United. These are different leagues, and maybe Antony plays differently because the tactics used at Betis suit him better. It’s also difficult for him to play under Amorim because the approach there is completely different, and it’s obvious that Amorim doesn’t want to trust him with a place in the team.