At least this is a very good start for Ruud Van Nistelrooy as Ten Hag's temporary replacement. And indeed, whether it's with him or with a new coach again, Man United really need solid consistency. Yes, consistency in good games, not consistency in bad games. 
Unfortunately Ruud Van Nistelrooy will only accompany Man United for a short time. And if this positive result is due to good tactics from Ruud Van Nistelrooy then I hope this can continue with the new Man United coach in the future. I am actually worried about what will happen after the new Man United coach arrives here. Will he fit into the Man United squad or not. After Ten Hag was fired, Man United won big in the previous match and Man United is now handled by interim coach Ruud van Nistelrooy. In the match against Chelsea, of course he wants to prove that Man United will return to the winning track after losing to West Ham in the previous week. So even though he doesn't need to prove anything because he will only coach two more matches before Man United's coach is filled by Ruben Amorim, Ruud van Nistelrooy of course with this little opportunity wants to prove that he is still needed to enter Ruben Amorim's coaching system later.
It is interesting to talk about Ruben Amorim because he is a very potential coach, only at Man United the pressure is greater than at Sporting. So if he wants to be successful with Man United he must be able to make Man United players obey him, no Man United player feels superior and Man United management does not intervene excessively with the team. That way he will be free to train Man United with all his abilities.