I agree, it is too early to assume that Man United have returned to winning ways in the premier league. in the previous match I saw that there were still many cracks in the defense so I think their victory was just luck if everton can hit them early.
and also true do not give big expectations to man utd when playing against arsenal especially when playing away. if true man utd can win this it means amorim a coach who is really quick to adapt in a new team and cannot be concluded as a successor to man utd
New coaches will usually always make more evaluations after playing a match, whether in a winning condition or in a losing condition. Because the gaps as you mentioned could be fixed by Amorim when playing the next match and coincidentally today Manchester United will visit Arsenal's headquarters. So let's see how Manchester United will compete at Arsenal's headquarters today because every result is not a coincidence for every team, including what Manchester United got last week.