And manager Ole Gunnar Solskjaer reckons the fans deserve this win more than anyone, and that this will be the focus heading into the game at Old Trafford.
Andreas Pereira's deflected goal gave United the lead on 17 minutes and it was doubled two minutes later when McTominay forced Davy Propper into putting through his own net.
It was a convincing display from Solskjaer's men, who have now scored three goals in both of their last two home matches - the last coming against Partizan Belgrade in the Europa League on Thursday. Solskjaer claimed, as quoted by the Evening Standard: "I think it's our best performance of the season". "It was an excellent performance from the lads, when you see them going forward it is a joy to watch. How that didn't end up five, six, seven, we don't know, the players don't know", said a delighted Solskjaer.
The England global has bagged six goals from his previous six starts for the Red Devils and that includes crucial strikes against the likes of Liverpool and Chelsea.More news: Djokovic begins ATP Finals with easwy victory
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United had the ideal response two minutes later, however, with Rashford smashing a shot off the crossbar and in after an assist from Anthony Martial.
"The table does not really matter at the moment: we need to keep improving and keep winning games and see where it takes us".
As it was, there was a worry for United in the 64th minute when Brighton halved arrears from a Pascal Gross corner, met by Lewis Dunk, who headed in from six yards despite the close attention of Maguire.
Teenage full-back Brandon Williams, making his first league start, James and Rashford were all denied by Ryan as United threatened to make the victory even more emphatic, while McTominay suffered a worrying late ankle injury which will be assessed on Monday. "We'll do our best so that we can get into the top positions".