#2 Her old look was becoming stale
Bayley has had the same look and character since she was in NXT more than five years ago. She was the last member of The Four Horsewomen to be moved to the main roster and was the last member to win a main roster Championship. She has been consistently booked badly by WWE in favor of Charlotte Flair and it's easy to see why.
Bayley's entire gimmick was the fact that she was going to hug her opponents and that when she pulled her ponytail tight, the finish line was in sight. Bayley has gotten rid of the Bayley Buddies, been given some fresh entrance music and no longer has the side ponytail that sold her so much merchandise. Instead, she has gone for a much shorter hair cut and much darker in-ring attire for her new character.
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Bayley needed to shake things up and get herself noticed and she picked the right time to do it. The shock factor has definitely hit social media and it allowed her to pick up the SmackDown Women's Championship by pinning Charlotte for the second time in five months.