It is a very interesting incident. According to news, people who were accusing him suddenly decided to recuse. I still doubt he is really not guilty after all those charges first.
If I were in Manchester United's place I would still wait for some time to make sure about the truth. Because those were really serious charges and it was like this nearly ended his professional football career. If they decide to call him to the squad quickly then I'm sure people will criticize the team a lot. They had better wait for a proof to act about him. Normally Greenwood is a really skilled player and the team would like to see him back in the team of course. But let's see how this ends.