#3 Could eventually turn back to face: Heels who turn face are often the most popular faces
It's hard to see a plan to turn a character heel having benefits long-term, but in the case of Bayley, a heel turn now may help down the road. In the immediate future, a heel turn would leave it open for her to have matches against other faces on the roster that otherwise may not happen.
Look at the most recent turn of The Usos: when Jimmy and Jey wore face paint and embraced their Samoan roots it was welcomed and enjoyed by the fans. However, as time passed, fans grew tired of their gimmick, the bright colours they wore in the ring and how they came to the ring celebrating their heritage by performing ancestral chants, or Haka.
Fans drowned out a popular wrestler with 'She's a racist' chants recently
When they embraced the jeers and changed direction through a heel turn, we witnessed Usos that were more authentic and reflective of who they were now rather than who they had been.
Fans are now loving the Uso penitentiary, and they have transitioned from heels to once again beloved faces, though with very different character. A heel turn for Bayley could ultimately result down the road in her becoming a more popular face than she is right now.