No, that would not help Trump, because whether or not he had sex with them is irreverent as far as the "crime" is concerned.
The whole thing is designed to drag Trump through the mud, keep him from campaigning, punish him brutalize him with legal costs, and at the end of the day, it does not matter that much if he is convicted. If he is convicted, it will go to appeal, and if he is acquitted, the damage will have been done, and the press will be all about why he was really guilty, in spite of his being acquitted.
Had he reported the stormy payment as a campaign expense, he would have been prosecuted for that.