I don’t think you can edit the film in a seamless manor to make that reveal the slightest bit impactful. At best it’ll come off like a good PT edit meaning it’ll be only passable.
I think the question should be “Is the prospect that Kylo Ren is Han and Leia’s kid worthy of a big reveal?” And I say no. Everyone saw it coming and even the film makers didn’t deem it necessary to make it a bigger deal than it already was.