With the latest patch revealing some of the new changes coming to Ana, DVa, Roadhog & Sombra, Lucio's change went unnoticed! As if Blizzard activated 'Stealth mode' on it.
Apperantly, an option has been added when you're playing Lucio to enable 'Wallriding backwards'. Now if you've ever felt like moonwalking as Lucio, you can do so as of now, on the PTR at least.
Ofcourse we wouldn't let you down without any proof of how this looks like, so with credits to Admiral Sirius, we bring you this video where he shows us how it's done: