Ruben Amorim isn't a chemistry teacher but at the moment, he's doing more experiments than a chemists and that's because he inherited a team that was struggling so he's trying to figure out the best formation and style of football that'll bring out the best from his players. I've said it before now that though Amorim have a record of improving a team and making it strong and very competitive, I don't expect him to win a major trophy this season. I don't know how far they'll go in the Europa League but I don't see them as a serious contender for Europa League trophy this season
Haha, is it only a Chemistry teacher that can do studies?? 
I think what he meant is that Amorim should take drastic decisions on some players that are surplus to requirements in Manchester United team, if he feel like the player is not useful he should call for him to be sold irrespective of the player’s status or influence in the team.
But if the management give him the opportunity to sign more players, he should also use his head, and he should also sign young players and remove selfishness in order to get a better players for the team because Manchester United need to be good again.
For those players, I feel like if you just take them out, and left with players who wants to win, and giving their 100% to win, then even if they are less talented, they have a bigger chance to win. That's why I always say that kicking players out to B team, or youth team, to train, until they are sold, would make things a lot better, would give rest of the team a lot more chance to win.