#1. A lack of defined characters - Roman Reigns and the return of 'edginess'
Roman Reigns' heel turn means that we can finally get to witness the edgier side of him that fans have been craving to see for years. When WWE tried to push him as a white-meat babyface in 2015, it was clear that it didn't suit him and that Vince McMahon was trying to push his idea of what Roman Reigns should be.
Fans, critics, and even legends of the past had a simple message: "Let Roman Reigns be himself". WWE might finally be letting him do that and as a result of that, SmackDown may not have a clear-cut and well-defined babyface for a while going forward.
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Since Roman Reigns, Bray Wyatt, and Braun Strowman are the three primary characters on the show, WWE may not try to have a defined babyface. While it normally helps to have one, it's a good time to experiment with having more edgy characters on-screen. For all we know, it could lead to something incredible.