I've mentioned this before--build a temporary station halt on the current freight railway line that passes by the Regional Athletics stadium.Then,with the recent opening of the new Ordsall Chord you could have special matchday trains that start at Manchester Piccadilly,pick up at Manchester Victoria then straight to the Stadium.After the game just the reverse journeys.With Newton Heath diesel loco shed being very nearby easy-peasy for lots and lots of spare railway stock which could,in theory, transport 3 -4 times as many people as the trams do.All to the destinations of their choice.
Finally,as most things in life,where there's a will there's a way, where there's no will there's no way!!.