Why, though?
I already brought it up in this post, but it looks like Genji only lost two natural breakpoints: the ability to two-shot squishies with a Headshot+Melee, and the ability to three-shot a Reaper with Headshot+Strike+Melee. Every other breakpoint he lost was either with some type of damage boost and/or really only matters for letting him insta-delete characters with the healthpool of Reaper or above.
And even in the case of that first combo, he can still get the kill…but he just needs to use Strike instead of Melee.